2005 MERCEDES-BENZ SPRINTER Service Repair Manual

BRAKE PADS/SHOES
REMOVAL
REMOVAL - FRONT (SRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the front wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - REMOVAL).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 4).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake caliper guide bolt (Fig. 4).
(6) Remove the brake caliper (Fig. 4).
(7) Remove the brake pads (Fig. 4).
REMOVAL - FRONT (DRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the front wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - REMOVAL).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 5).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake caliper guide bolt (Fig. 5).
(6) Remove the brake caliper (Fig. 5).(7) Remove the brake pads (Fig. 5).
REMOVAL - REAR (16º WHEELS) (SRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 6).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake caliper guide pins (Fig. 6).
(6) Remove the brake caliper from the caliper
adapter (Fig. 6).
(7) Remove the retaining spring (Fig. 6).
(8) Remove the pads (Fig. 6).
REMOVAL - REAR (15º WHEELS) (SRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 7).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake caliper guide pin (Fig. 7).
Fig. 4 FRONT BRAKE PADS
1 - DISC BRAKE CALIPER
2 - GUIDE BOLT
3 - WEAR INDICATOR
4 - DISC BRAKE PADS
5 - CALIPER ADAPTER
Fig. 5 FRONT DISC BRAKE PADS WITH DUAL
REAR WHEELS
1 - DISC BRAKE CALIPER
2 - GUIDE PIN/BOLT
3 - WEAR INDICATOR
4 - BRAKE PADS
5 - BRAKE CALIPER ADAPTER
VABRAKES - BASE 5 - 9

(6) Fold the top section of the brake caliper up
(Fig. 7).
(7) Remove the pads (Fig. 7).
REMOVAL - REAR (DRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.(3) Remove the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 8).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake caliper guide pins (Fig. 8).
(6) Remove the brake caliper from the caliper
adapter (Fig. 8).
(7) Remove the retaining spring (Fig. 8).
(8) Remove the pads (Fig. 8).
INSTALLATION
INSTALLATION - FRONT (SRW)
(1) Install the brake pads (Fig. 4).
(2) Install the wear indicator cable and the wear
indicator (Fig. 4). Tighten to 10 N´m (89 in. lbs.).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(3) Install the brake caliper to the brake caliper
adapter (Fig. 4). Tighten the guide bolt to 25 N´m
(221 in. lbs.).
(4) Bleed the brake system.
(5) Check the brake system for any leaks.
(6) Install the front wheels.
(7) Lower the vehicle.
Fig. 6 REAR DISC BRAKE PADS - 16(WHEELS
(SRW)
1 - AXLE
2 - RETAINING SPRING
3 - OUTBOARD PADS
4 - INBOARD PAD
5 - DISC BRAKE CALIPER
6 - WEAR INDICATOR
7 - GUIDE PIN
8 - DUST CAP
Fig. 7 REAR DISC BRAKE PADS - 15(WHEELS
(SRW)
1 - CALIPER GUIDE PIN
2 - DISC BRAKE CALIPER
3 - CALIPER ADAPTER
4 - DISC BRAKE PADS
5 - RETAINING SPRING
6 - WEAR INDICATOR
Fig. 8 REAR DISC BRAKE PADS WITH DUAL REAR
WHEELS
1 - WEAR INDICATOR
2 - GUIDE PIN/BOLT
3 - DISC BRAKE CALIPER
4 - RETAINING SPRING
5 - DISC BRAKE PADS
6 - CALIPER ADAPTER
5 - 10 BRAKES - BASEVA
BRAKE PADS/SHOES (Continued)

INSTALLATION - FRONT (DRW)
(1) Install the brake pads (Fig. 5).
(2) Install the wear indicator cable and the wear
indicator (Fig. 5). Tighten to 10 N´m (89 in. lbs.).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(3) Install the brake caliper to the brake caliper
adapter (Fig. 5). Tighten the guide bolt to 25 N´m
(221 in. lbs.)(M8 bolt) or Tighten the guide bolt to 30
N´m (265 in. lbs.)(M10 10.9 bolt).
(4) Bleed the brake system.
(5) Check the brake system for any leaks.
(6) Install the front wheels.
(7) Lower the vehicle.
INSTALLATION - REAR (16º WHEELS) (SRW)
(1) Install the brake pads (Fig. 6).
(2) Install the wear indicator cable and the wear
indicator (Fig. 6). Tighten to 10 N´m (89 in. lbs.).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(3) Install the brake caliper to brake caliper
adapter (Fig. 6). Tighten the guide pins to 25 N´m
(221 in. lbs.) for M8 bolt or 30 N´m (266 in. lbs.) for
M10 bolt.
(4) Install the retaining spring (Fig. 6).
(5) Install the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(6) Lower the vehicle.
INSTALLATION - REAR (16º WHEELS) (SRW)
(1) Install the brake pads (Fig. 7).
(2) Install the wear indicator cable and the wear
indicator (Fig. 7). Tighten to 10 N´m (89 in. lbs.).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(3) Install the brake caliper to brake caliper
adapter (Fig. 7). Tighten the guide pin to 30 N´m
(266 in. lbs.) for M10 bolt.
(4) Install the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(5) Lower the vehicle.
INSTALLATION - REAR (DRW)
(1) Install the brake pads (Fig. 8).
(2) Install the wear indicator cable and the wear
indicator (Fig. 8). Tighten to 10 N´m (89 in. lbs.).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.(3) Install the brake caliper to brake caliper
adapter (Fig. 8). Tighten the guide pins to 25 N´m
(221 in. lbs.) for M8 bolt or 30 N´m (266 in. lbs.) for
M10 10.9 bolt.
(4) Install the retaining spring (Fig. 8).
(5) Install the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(6) Lower the vehicle.
DISC BRAKE CALIPERS
REMOVAL
REMOVAL - FRONT (SRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the front wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - REMOVAL).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 9).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake hose at the brake caliper
(Fig. 9).
(6) Remove the brake caliper guide bolt (Fig. 9).
(7) Remove the brake caliper (Fig. 9).
Fig. 9 FRONT DISC BRAKE CALIPER
1 - WEAR INDICATOR CABLE
2 - WEAR INDICATOR
3 - BOLT
4 - BRAKE HOSE
5 - DISC BRAKE CALIPER/ADAPTER
6 - ADAPTER BOLTS
VABRAKES - BASE 5 - 11
BRAKE PADS/SHOES (Continued)

REMOVAL - FRONT (DRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the front wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - REMOVAL).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 10).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake hose at the brake caliper
(Fig. 10).
(6) Remove the brake caliper guide bolt (Fig. 10).
(7) Remove the brake caliper (Fig. 10).
REMOVAL - REAR (SRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 11).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake hose at the brake caliper
(Fig. 11).
(6) Remove the brake caliper guide bolt (Fig. 11).
(7) Remove the brake caliper (Fig. 11).
REMOVAL - REAR (DRW)
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(4) Remove the wear indicator cable and the wear
indicator (Fig. 12).
NOTE: Seal off the line ends and connection
threads in the brake calipers with plugs. Also check
brake hoses for signs of cracks.
(5) Remove the brake hose at the brake caliper
(Fig. 12).
(6) Remove the brake caliper guide bolt (Fig. 12).
(7) Remove the brake caliper (Fig. 12).
INSTALLATION
INSTALLATION - FRONT (SRW)
(1) Install the brake caliper to the brake caliper
adapter (Fig. 9). Tighten the guide pins to 25 N´m
(221 in. lbs.).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(2) Install the brake hose at the brake caliper (Fig.
9). Tighten the bolt to 14 N´m (124 in. lbs.).
(3) Install the wear indicator cable and the wear
indicator (Fig. 9). Tighten to 10 N´m (89 in. lbs.).
(4) Bleed the brake system.
(5) Check the brake system for any leaks.
Fig. 10 DISC BRAKE CALIPER WITH DUAL REAR
WHEELS
1 - WEAR INDICATOR WIRE
2 - WEAR INDICATOR
3 - MOUNTING BOLT
4 - BRAKE HOSE
5 - DISC BRAKE CALIPER
6 - ADAPTOR BOLTS
Fig. 11 REAR DISC BRAKE CALIPER
1 - BRAKE HOSE
2 - BANJO BOLT
3 - WEAR INDICATOR
4 - CALIPER ADAPTER BOLTS
5 - DISC BRAKE CALIPER
6 - WEAR INDICATOR
5 - 12 BRAKES - BASEVA
DISC BRAKE CALIPERS (Continued)

(6) Install the front wheels.
(7) Lower the vehicle.
INSTALLATION - FRONT (DRW)
(1) Install the brake caliper to the brake caliper
adapter (Fig. 10). Tighten the guide pins to 25 N´m
(221 in. lbs.)(M8 bolt) or Tighten the guide pins to 30
N´m (265 in. lbs.)(M10 10.9 bolt).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(2) Install the brake hose at the brake caliper (Fig.
10). Tighten the bolt to 14 N´m (124 in. lbs.).
(3) Install the wear indicator cable and the wear
indicator (Fig. 10). Tighten to 10 N´m (89 in. lbs.).
(4) Bleed the brake system.
(5) Check the brake system for any leaks.
(6) Install the front wheels.
(7) Lower the vehicle.
INSTALLATION - REAR (SRW)
(1) Install the brake caliper to brake caliper
adapter (Fig. 11). Tighten the guide bolt to 25 N´m
(221 in. lbs.) for M8 bolt or 30 N´m (266 in. lbs.) for
M10 bolt.
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(2) Install the brake hose at the brake caliper (Fig.
11). Tighten the bolt to 14 N´m (124 in. lbs.).(3) Install the wear indicator cable and the wear
indicator (Fig. 11). Tighten to 10 N´m (89 in. lbs.).
(4) Bleed the brake system.
(5) Check the brake system for any leaks.
(6) Install the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(7) Lower the vehicle.
INSTALLATION - REAR (DRW)
(1) Install the brake caliper to brake caliper
adapter (Fig. 12). Tighten the guide bolt to 25 N´m
(221 in. lbs.) for M8 bolt or 30 N´m (266 in. lbs.) for
M10 bolt.
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(2) Install the brake hose at the brake caliper (Fig.
12). Tighten the bolt to 14 N´m (124 in. lbs.).
(3) Install the wear indicator cable and the wear
indicator (Fig. 12). Tighten to 10 N´m (89 in. lbs.).
(4) Bleed the brake system.
(5) Check the brake system for any leaks.
(6) Install the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(7) Lower the vehicle.
DISC BRAKE CALIPER
ADAPTER
REMOVAL
REMOVAL - FRONT
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the front wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - REMOVAL).
(4) Remove the disc brake caliper from the caliper
adapter (Refer to 5 - BRAKES/HYDRAULIC/ME-
CHANICAL/DISC BRAKE CALIPERS - REMOVAL).
(5) Remove the disc brake pads (Refer to 5 -
BRAKES/HYDRAULIC/MECHANICAL/BRAKE
PADS/SHOES - REMOVAL).
(6) Remove the disc brake caliper adapter.
REMOVAL - REAR
(1) Unscrew the cap from the brake fluid reservoir.
(2) Raise and support the vehicle.
(3) Remove the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(4) Remove the disc brake caliper.
(5) Remove the disc brake pads.
(6) Remove the disc brake caliper adapter.
Fig. 12 REAR DISC BRAKE CALIPER WITH DUAL
REAR WHEELS
1 - ADAPTER BOLT
2 - WEAR INDICATOR MOUNTING BOLT
3 - WEAR INDICATOR
4 - BRAKE LINE
5 - CLAMP
6 - BRAKE HOSE
7 - BRAKE CALIPER
VABRAKES - BASE 5 - 13
DISC BRAKE CALIPERS (Continued)

INSTALLATION
INSTALLATION - FRONT
(1) Install the brake caliper adapter to the steering
knuckle. Tighten to 170 N´m (125 ft. lbs.).
(2) Install the disc brake shoes (Refer to 5 -
BRAKES/HYDRAULIC/MECHANICAL/BRAKE
PADS/SHOES - INSTALLATION).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(3) Install the disc brake caliper. Tighten the bolt
to 14 N´m (124 in. lbs.) (Refer to 5 - BRAKES/HY-
DRAULIC/MECHANICAL/DISC BRAKE CALIPERS
- INSTALLATION).
(4) Install the front wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(5) Lower the vehicle.
INSTALLATION - REAR
(1) Install the brake caliper adapter to the axle
mount. Tighten to 90 N´m (66 ft. lbs.) for M12X1.5
bolt or 170 N´m (125 ft. lbs.) for M14X1.5 bolt.
(2) Install the disc brake pads (Refer to 5 -
BRAKES/HYDRAULIC/MECHANICAL/BRAKE
PADS/SHOES - INSTALLATION).
NOTE: Do not install the brake hose twisted and
ensure freedom of movement.
(3) Install the disc brake caliper (Refer to 5 -
BRAKES/HYDRAULIC/MECHANICAL/DISC
BRAKE CALIPERS - INSTALLATION).
(4) Install the rear wheels (Refer to 22 - TIRES/
WHEELS/WHEELS - INSTALLATION).
(5) Lower the vehicle.
FLUID
DIAGNOSIS AND TESTING - BRAKE FLUID
CONTAMINATION
Indications of fluid contamination are swollen or
deteriorated rubber parts.
Swollen rubber parts indicate the presence of
petroleum in the brake fluid.
To test for contamination, put a small amount of
drained brake fluid in clear glass jar. If fluid sepa-
rates into layers, there is mineral oil or other fluid
contamination of the brake fluid.
If brake fluid is contaminated, drain and thor-
oughly flush system. Replace master cylinder, ALB
Controller, caliper seals, Antilock Brakes hydraulic
unit and all hydraulic fluid hoses.
STANDARD PROCEDURE - BRAKE FLUID
LEVEL
Always clean the master cylinder reservoir and
caps before checking fluid level. If not cleaned, dirt
could enter the fluid.
The fluid fill level is indicated on the side of the
master cylinder reservoir (Fig. 13).
The correct fluid level is to the MAX indicator on
the side of the reservoir. If necessary, add fluid to the
proper level.
SPECIFICATIONS
BRAKE FLUID
The brake fluid used in this vehicle must conform
to DOT 4 specifications and SAE standards. No other
type of brake fluid is recommended or approved for
usage in the vehicle brake system. Use only Mopar
brake fluid or an equivalent from a tightly sealed
container.
CAUTION: Never use reclaimed brake fluid or fluid
from an container which has been left open. An
open container of brake fluid will absorb moisture
from the air and contaminate the fluid.
CAUTION: Never use any type of a petroleum-based
fluid in the brake hydraulic system. Use of such
type fluids will result in seal damage of the vehicle
brake hydraulic system causing a failure of the
vehicle brake system. Petroleum based fluids would
be items such as engine oil, transmission fluid,
power steering fluid, etc.
Fig. 13 FLUID LEVEL TYPICAL
1 - FLUID RESERVOIR
2 - MAX LEVEL MARK
5 - 14 BRAKES - BASEVA
DISC BRAKE CALIPER ADAPTER (Continued)

FLUID RESERVOIR
REMOVAL
(1) Using a suction gun remove as much brake
fluid from the reservoir as possible (Fig. 14).
(2) Disconnect the electrical connector for the
brake fluid level indicator (Fig. 14).
(3) Remove the fluid reservoir (Fig. 14).Seal off
the ends and bore holes with plugs.
INSTALLATION
(1) Install the fluid reservoir and fill with fluid
(Fig. 14).
(2) Bleed the brake system.
(3) Check the brake system for any leaks.
(4) Reconnect the electrical connector to the brake
fluid level indicator (Fig. 14).
ALB LEVER
REMOVAL
(1) Raise and support the vehicle.
(2) Remove the retaining clip for the ALB lever
(Fig. 15).
(3) Remove the bolt for the lever at the axle (Fig.
15).
(4) Remove the lever.
INSTALLATION
(1) Install the lever to the vehicle.
(2) Install the lower mounting bolt to the axle (Fig.
15).(3) Install the lever to the shock bolt and then
install the clip (Fig. 15).
(4) Check the side deflection of the ALB lever with
a straight edge from Point-A to Point-B as the
graphic shows. Max deflection play of the actuator
rod should be no more than 15 mm (.60 in) (Fig. 15).
(5) Lower the vehicle.
ALB CONTROLLER
REMOVAL
(1) Install the brake pedal rod to hold the brake
pressure.
(2) Raise and support the vehicle.
(3) Remove the brake lines to the (automatic load-
dependant brake pressure control) ALB controller.
(4) Remove the adjusting nut and the spring from
the ALB controller.
(5) Remove the mounting bolts.
(6) Remove the ALB controller.
INSTALLATION
(1) Install the ALB controller to the vehicle.
(2) Install the mounting bolts for the controller.
(3) Install the brake lines. Tighten the lines to 16
N´m (142 in. lbs.)
(4) Install the adjusting rod, nut and spring to the
ALB controller.
(5) Lower the vehicle.
(6) Remove the brake pedal hold down rod.
(7) Fill and bleed the brake system (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
Fig. 14 FLUID RESERVOIR
1 - SUCTION GUN
2 - BRAKE FLUID CAP
3 - BRAKE FLUID LEVEL INDICATOR
4 - MASTER CYLINDER
5 - FLUID RESERVOIR
Fig. 15 ALB LEVER DEFLECTION
1 - CLIP
2 - SPRING
3 - LEVER
4 - STRIAGHT EDGE
5 - NUT
6 - POINT -A
7 - POINT - B
8 - SUSPENSION POINT
VABRAKES - BASE 5 - 15

(8) Raise the vehicle and adjust the ALB controller
(Refer to 5 - BRAKES/HYDRAULIC/MECHANICAL/
ALB CONTROLLER - ADJUSTMENTS).
(9) Lower the vehicle and test drive.
ADJUSTMENTS
ADJUSTMENT
(1) Clean any debris away from the test ports caps
at the ALB controller.
(2) Connect brake adapters special tool 9297 to the
test ports at the ALB controller.
(3) Install a Pressure Gauge, Special Tool
C-4007-A, to the adapters.
(4) Tighten all tube nut fittings to 17 N´m (145 in.
lbs.) torque.
(5) Bleed any air out of the system. This includes
bleeding the air from the hose between the pressure
test fitting and pressure gauge, which is done at the
pressure gauge.
NOTE: Adjustment is determined for the automatic
load-dependent brake power control system accord-
ing to the ALB plate. This is housed in the stowage
compartment under the front passenger's door
panel. The part number of the rear spring is
stamped into the spring eye. This must correspond
to the part number of the rear spring on the ALB
plate.
(6) To accurately adjust the rear axle load you
must first determine the rear axle load by weighing
the vehicle at a local scale.
(7) Install the brake pedal winch Special tool 9296
between the brake pedal and the driver seat and
slowly turn the dial until the specified inlet brake
pressure is indicated at the gauge.
NOTE: The pressure gauge, connected at the ALB
controller must indicate the outlet pressure which
is assigned on the ALB plate to the rear axle load
determined.
NOTE: If the rear axle load determined is between
two figures indicated on the ALB plate, the outlet
pressure should be determined accordingly.
(8) If the pressure measured differs from the spec-
ification, adjust the ALB controller (Fig. 16).
(9) Loosen the brake pedal winch.
(10) Adjust the outlet pressure by turning the
adjusting nut (Fig. 16)To increase pressure -
tighten the adjusting nut. To reduce pressure -
loosen the adjusting nut.(11) After adjustment reinstall the brake pedal
winch and recheck the pressures and readjust if
needed.
(12) Tighten the lock adjusting nut.
MASTER CYLINDER
DIAGNOSIS AND TESTING - MASTER
CYLINDER/POWER BOOSTER
(1) Start engine and check booster vacuum hose
connections. A hissing noise indicates vacuum leak.
Correct any vacuum leak before proceeding.
(2) Stop engine and shift transmission into Neu-
tral.
(3) Pump brake pedal until all vacuum reserve in
booster is depleted.
(4) Press and hold brake pedal under light foot
pressure. The pedal should hold firm, if the pedal
falls away master cylinder is faulty (internal leak-
age).
(5) Start engine and note pedal action. It should
fall away slightly under light foot pressure then hold
firm. If no pedal action is discernible, power booster,
vacuum supply, or vacuum check valve is faulty. Pro-
ceed to the POWER BOOSTER VACUUM TEST.
(6) If the POWER BOOSTER VACUUM TEST
passes, rebuild booster vacuum reserve as follows:
Release brake pedal. Increase engine speed to 1500
rpm, close the throttle and immediately turn off igni-
tion to stop engine.
(7) Wait a minimum of 90 seconds and try brake
action again. Booster should provide two or more vac-
uum assisted pedal applications. If vacuum assist is
not provided, booster is faulty.
Fig. 16 ALB CONTROLLER ADJUSTER NUT
1 - ALB ADJUSTER NUT
2 - SPRING
5 - 16 BRAKES - BASEVA
ALB CONTROLLER (Continued)