2002 DODGE RAM power

(11) Remove teflon ring and O-ring from the rack
piston (Fig. 38).
(12) Remove the adjuster lock nut and adjuster
nut from the stub shaft.
(13) Pull the stub shaft with the spool valve and
thrust support assembly out of the housing.
(14) Remove the worm shaft from the housing
(Fig. 39).
INSTALLATION
NOTE: Clean and dry all components and lubricate
with power steering fluid.
(1) Check for scores, nicks or burrs on the rack
piston finished surface. Slight wear is normal on the
worm gear surfaces.
(2) Install O-ring and teflon ring on the rack pis-
ton.
(3) Install worm shaft in the rack piston and align
worm shaft spiral groove with rack piston ball guide
hole (Fig. 40).
Fig. 37 Rack Piston
1 - CLAMP
2 - BALLS
3 - RACK PISTON
4 - BALL GUIDE
Fig. 38 Rack Piston Teflon Ring and O-Ring
1 - TEFLON SEAL
2 - BACK-UP O-RING MUST BE INSTALLED UNDER PISTON
RING
3 - RACK PISTON NUT
Fig. 39 Worm Shaft
1 - GEAR HOUSING
2 - BEARING RACE
3 - WORM SHAFT
4 - BEARING
Fig. 40 Installing Balls in Rack Piston
1 - INSTALL BALLS IN THIS HOLE WHILE SLOWLY ROTATING
WORM COUNTER CLOCKWISE
2 - WORM FLANGE
BR/BEGEAR 19 - 31
WORM SHAFT (Continued)

PUMP
TABLE OF CONTENTS
page page
PUMP
DESCRIPTION.........................33
OPERATION...........................33
DIAGNOSIS AND TESTING - PUMP LEAKAGE . 33
STANDARD PROCEDURE
STANDARD PROCEDURE - POWER
STEERING PUMP - INITIAL OPERATION....33
STANDARD PROCEDURE - FLUSHING
POWER STEERING SYSTEM............34
REMOVAL
REMOVAL - GASOLINE ENGINE..........35
REMOVAL - DIESEL ENGINE............36
INSTALLATION
INSTALLATION - GASOLINE ENGINE......37INSTALLATION - DIESEL ENGINE.........37
SPECIAL TOOLS
POWER STEERING PUMP..............38
PULLEY
REMOVAL.............................38
INSTALLATION.........................39
HOSES - PRESSURE
DESCRIPTION.........................39
OPERATION...........................39
HOSES - RETURN
DESCRIPTION.........................39
OPERATION...........................39
PUMP
DESCRIPTION
The P-Series pump is used on these vehicles (Fig.
1). The pump shaft has a pressed-on pulley that is
belt driven by the crankshaft pulley on gasoline
engines. The pump is driven off the back of the vac-
uum pump on the diesel engine.
Trailer tow option vehicles are equipped with a
power steering pump oil cooler. The oil cooler is
mounted to the front crossmember.
NOTE: Power steering pumps are not interchange-
able with pumps installed on other vehicles.
OPERATION
Hydraulic pressure is provided by the pump for the
power steering gear. The power steering pump is a
constant flow rate and displacement, vane-type
pump. The pump is connected to the steering gear
via the pressure hose and the return hose. On vehi-
cles equipped with a hydraulic booster, the pump
supplies the hydraulic pressure for the booster.
DIAGNOSIS AND TESTING - PUMP LEAKAGE
(1) Possible pump leakage areas. (Fig. 2).
STANDARD PROCEDURE
STANDARD PROCEDURE - POWER STEERING
PUMP - INITIAL OPERATION
WARNING: THE FLUID LEVEL SHOULD BE
CHECKED WITH ENGINE OFF TO PREVENT INJURY
FROM MOVING COMPONENTS.
CAUTION: Use MOPAR Power Steering Fluid or
equivalent. Do not use automatic transmission fluid
and do not overfill.
Fig. 1 P-SeriesÐPump
1 - RESERVOIR CAP AND DIPSTICK
2 - RESERVOIR
BR/BEPUMP 19 - 33

Wipe filler cap clean, then check the fluid level.
The dipstick should indicateCOLDwhen the fluid is
at normal temperature.
(1) Turn steering wheel all the way to the left
(2) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two (2) minutes.
(3) Raise the front wheels off the ground.
(4) Slowly turn the steering wheel lock-to-lock 20
times with the engine off while checking the fluid
level.
NOTE: Vehicles with long return lines or oil coolers
turn wheel 40 times.
(5) Start the engine. With the engine idling main-
tain the fluid level.
(6) Lower the front wheels and let the engine idle
for two minutes.
(7) Turn the steering wheel in both direction and
verify power assist and quit operation of the pump.If the fluid is extremely foamy or milky looking,
allow the vehicle to stand a few minutes and repeat
the procedure.
CAUTION: Do not run a vehicle with foamy fluid for
an extended period. This may cause pump damage.
STANDARD PROCEDURE - FLUSHING POWER
STEERING SYSTEM
Flushing is required when the power steering/hy-
draulic booster system fluid has become contami-
nated. Contaminated fluid in the steering/booster
system can cause seal deterioration and affect steer-
ing gear/booster spool valve operation.
(1) Raise the front end of the vehicle off the
ground until the wheels are free to turn.
(2) Remove the return line from the pump.
NOTE: If vehicle is equipped with a hydraulic
booster remove both return lines from the pump.
Fig. 2 POWER STEERING PUMP
1 - CHECK OIL LEVEL; IF LEAKAGE PERSISTS WITH THE
CORRECT LEVEL AND CAP TIGHT, REPLACE THE CAP
2 - SHAFT SEAL3 - RESERVOIR O-RING
4 - O-RING SEAL
19 - 34 PUMPBR/BE
PUMP (Continued)

(3) Plug the return line port/ports at the pump.
(4) Position the return line/lines into a large con-
tainer to catch the fluid.
(5) While an assistant is filling the pump reservoir
start the engine.
(6) With the engine running at idle turn the wheel
back and forth.
NOTE: Do not contact or hold the wheel against the
steering stops.
(7) Run a quart of fluid through the system then
stop the engine and install the return line/lines.
(8) Fill the system with fluid and perform Steering
Pump Initial Operation, (Refer to 19 - STEERING/
PUMP - STANDARD PROCEDURE).
(9) Start the engine and run it for fifteen minutes
then stop the engine.
(10) Remove the return line/lines from the pump
and plug the pump port/ports.
(11) Pour fresh fluid into the reservoir and check
the draining fluid for contamination. If the fluid is
still contaminated, disassemble and clean the steer-
ing gear and flush the system again.
(12) Install the return line/lines and perform
Steering Pump Initial Operation, (Refer to 19 -
STEERING/PUMP - STANDARD PROCEDURE).
REMOVAL
REMOVAL - GASOLINE ENGINE
(1) Remove the serpentine drive belt, (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL) OR (Refer to 7 - COOLING/ACCESSORY
DRIVE/DRIVE BELTS - REMOVAL).
(2) Remove the hoses from the power steering
pump and cap the fittings.
(3) Remove battery ground cable and unthread
stud from cylinder head, do not remove from bracket.
(4) Loosen upper bracket bolt and remove the
lower bracket to engine block bolts.
(5) Pivot the pump assembly past the coolant tube.
(6) Remove the upper stud and remove upper bolt
from cylinder head.
(7) Remove steering pump and mounting bracket
from engine as an assembly.
(8) Remove the pump pulley with Puller C-4333, to
access pump attaching bolts, (Refer to 19 - STEER-
ING/PUMP/PULLEY - REMOVAL).
(9) Remove the front pump bracket (Fig. 3). On
8.0L engine remove rear pump bracket (Fig. 4).
Fig. 3 Pump Mounting 8.0L
1 - FRONT BRACKET
2 - REAR BRACKET
3 - STEERING PUMP
4 - PULLEY
Fig. 4 Pump Mounting 8.0L
1 - FRONT BRACKET
2 - REAR BRACKET
3 - STEERING PUMP
4 - PULLEY
BR/BEPUMP 19 - 35
PUMP (Continued)

INSTALLATION
INSTALLATION - GASOLINE ENGINE
(1) Install the front pump bracket and tighten
bolts to 47 N´m (35 ft. lbs.). On 8.0L engine install
rear pump bracket and tighten nut to 47 N´m (35 ft.
lbs.), tighten bolts to 24 N´m (18 ft. lbs.).
(2) Install the pump pulley with Installer
C-4063±B, (Refer to 19 - STEERING/PUMP/PULLEY
- INSTALLATION).
(3) Install steering pump assembly on the engine
block. Install the upper stud and bolt in bracket.
(4) Pivot the pump down past the coolant tube and
install the lower bolts in bracket.
(5) Tighten the bolts and nut to 41 N´m (30 ft.
lbs.).
(6) Connect the hoses to the pump.
(7) Install the serpentine drive belt, (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION), (Refer to 7 - COOLING/ACCES-
SORY DRIVE/DRIVE BELTS - INSTALLATION).
(8) Fill the reservoir with power steering fluid,
(Refer to 19 - STEERING/PUMP - STANDARD PRO-
CEDURE).
INSTALLATION - DIESEL ENGINE
(1) Install the two pump body spacers.
(2) Rotate the drive gear until the steering pump
and vacuum pump drive dogs align. Install the steer-
ing pump onto the vacuum pump bracket. Use care
to avoid damaging the oil seal in the vacuum pump
during installation.The steering pump housing
and spacers must mate completely with the
vacuum pump bracket.
(3) Install the vacuum pump bracket to steering
pump nuts and tighten to 24 N´m (18 ft. lbs.).
(4) Position new gasket on vacuum pump assem-
bly. Use sealer if necessary to retain the gasket.
(5) Align and install the pump assembly on the
engine. Ensure the steering pump stud is inserted
into the block bracket. Tighten the pump- to-engine
block attaching bolts to 77 N´m (57 ft. lbs.).
(6) Install the steering pump to attaching bracket
nut and tighten to 24 N´m (18 ft. lbs.).
(7) Remove plug and install the oil pressure send-
ing unit and electrical connector.
(8) Install the oil feed line to the vacuum pump.
Tighten the oil line connection to 7 N´m (60 in. lbs./ 5
ft. lbs.).
Fig. 8 Bracket Mounting Nuts
1 - VACUUM PUMP
2 - ATTACHING NUTS
3 - STEERING PUMP
4 - PUMP SPACERS
5 - OIL FEED FITTING
Fig. 9 Steering Pump & Vacuum Pump
1 - PUMP SHAFT
2 - VACUUM FITTING
3 - VACUUM PUMP DRIVE
4 - OIL SEAL
5 - MOUNTING BRACKET
6 - DRIVE DOG
7 - PUMP SPACERS
BR/BEPUMP 19 - 37
PUMP (Continued)

(9) Install the fluid hoses to the power steering
pump. Tighten the pressure fitting at the pump to 31
N´m (23 ft. lbs.).
(10) Install and clamp the hose on the vacuum
pump.
(11) Install the serpentine belt, (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
(12) Fill the reservoir with power steering fluid,
(Refer to 19 - STEERING/PUMP - STANDARD PRO-
CEDURE).
(13) Start the engine and check the operation of
the brakes.
SPECIAL TOOLS
POWER STEERING PUMP
PULLEY
REMOVAL
(1) Remove pump assembly.
(2) Remove pulley from pump with Puller C-4333
(Fig. 10).
Analyzer Set, Power Steering Flow/Pressure 6815
Adapters, Power Steering Flow/Pressure Tester
6893
Puller C-4333
Installer, Power Steering Pulley C-4063±B
Fig. 10 Pulley Removal
1 - POWER STEERING PUMP DRIVE PULLEY
2 - SPECIAL TOOL C-4333
19 - 38 PUMPBR/BE
PUMP (Continued)

INSTALLATION
(1) Replace pulley if bent, cracked, or loose.
(2) Install pulley on pump with Installer C-4063-B
(Fig. 11) flush with the end of the shaft. Ensure the
tool and pulley remain aligned with the pump shaft.
(3) Install pump assembly.
(4) With Serpentine Belts; Run engine until warm
(5 min.) and note any belt chirp. If chirp exists, move
pulley outward approximately 0.5 mm (0.020 in.). If
noise increases, press on 1.0 mm (0.040 in.).Be
careful that pulley does not contact mounting
bolts.
HOSES - PRESSURE
DESCRIPTION
The hose consists of two metal ends and rubber
center section that contains a tuning cable.
OPERATION
Power steering pressure line, is used to transfer
high pressure power steering fluid, from the power
steering pump to the power steering gear.
HOSES - RETURN
DESCRIPTION
Power steering return line is a hose which is
clamped at the pump and the gear.
OPERATION
Power steering return line, is used to transfer low
pressure power steering fluid, from the power steer-
ing gear to the power steering pump.
Fig. 11 Pulley Installation
1 - POWER STEERING PUMP DRIVE PULLEY
2 - SPECIAL TOOL C-4063±B
BR/BEPUMP 19 - 39
PULLEY (Continued)

GEAR RATIOS
GEAR RATIO
FIRST 5.61:1
SECOND 3.04:1
THIRD 1.67:1
FOURTH 1.00:1
FIFTH 0.75:1
REVERSE 5.04:1
IDENTIFICATION
The transmission identification tag is attached to
the driver side PTO cover (Fig. 3).
The tag provides the transmission model number,
build date and part number. Be sure to reinstall the
I.D. tag if removed during service. The information
on the tag is essential to correct parts ordering.
OPERATION
The manual transmission receives power through
the clutch assembly from the engine. The clutch disc
is splined to the transmission input shaft and is
turned at engine speed at all times that the clutch is
engaged. The input shaft is connected to the trans-
mission countershaft through the mesh of fourth
speed gear on the input shaft and the fourth counter-
shaft gear. At this point all the transmission gears
are spinning.The driver selects a particular gear by moving the
shift lever to the desired gear position. This move-
ment moves the internal transmission shift compo-
nents to begin the shift sequence. As the shift lever
moves the selected shift rail, the shift fork attached
to that rail begins to move. The fork is positioned in
a groove in the outer circumference of the synchro-
nizer sleeve. As the shift fork moves the synchronizer
sleeve, the synchronizer begins to speed-up or slow
down the selected gear (depending on whether we are
up-shifting or down-shifting). The synchronizer does
this by having the synchronizer hub splined to the
mainshaft, or the countershaft in some cases, and
moving the blocker ring into contact with the gear's
friction cone. As the blocker ring and friction cone
come together, the gear speed is brought up or down
to the speed of the synchronizer. As the two speeds
match, the splines on the inside of the synchronizer
sleeve become aligned with the teeth on the blocker
ring and the friction cone and eventually will slide
over the teeth, locking the gear to the mainshaft, or
countershaft, through the synchronizer.
DIAGNOSIS AND TESTING
LOW LUBRICANT LEVEL
A low transmission lubricant level is generally the
result of a leak, inadequate lubricant fill or an incor-
rect lubricant level check. A correct lubricant level
check can only be made when the vehicle is level.
Also allow the lubricant to settle for a minute or so
before checking. These recommendations will ensure
an accurate check and avoid an underfill or overfill
condition. Always check the lubricant level after any
addition of fluid to avoid an incorrect lubricant level
condition.
Leaks can occur at the mating surfaces of the gear
case, adaptor or extension housing, or from the front/
rear seals. A suspected leak could also be the result
of an overfill condition. Leaks at the rear of the
extension or adapter housing will be from the hous-
ing oil seals. Leaks at component mating surfaces
will probably be the result of inadequate sealer, gaps
in the sealer, incorrect bolt tightening or use of a
non-recommended sealer. A leak at the front of the
transmission will be from either the front bearing
retainer or retainer seal. Lubricant may be seen drip-
ping from the clutch housing after extended opera-
tion. If the leak is severe, it may also contaminate
the clutch disc causing the disc to slip, grab and or
chatter.
Fig. 3 Identification Tag Location
1 - PTO COVER
2 - I.D. TAG
BR/BEMANUAL - NV4500 21 - 3
MANUAL - NV4500 (Continued)