1987 MAZDA 626 maintenance

4C FUEL SYSTEM
^ Pulsation
damper
76G04C-121
Pulsation damper
—
Delivery pipe
76G04C-122
Fuel hose
,Fuel pump
-Intank filter
76G04C-123
Insulator
f f r—
/ 0 DM

•
II r
O - ring
Grommet
Manifold
Delivery pipe
Pressure Regulator
1. Remove the engine hanger.
2. Disconnect the vacuum hose and fuel return hose.
3. Remove the pressure regulator.
4. Install in the reverse order of removal.
Tightening torque:
8—11 Nm (0.8—1.1 m-kg, 69—95 in-lb)
Pulsation Damper
1. Remove the delivery pipe assembly. (Refer to page
4C-63.)
2. Remove the pulsation damper.
3. Install in the reverse order of removal.
Tightening torque:
25—34 N m (2.5—3.5 m-kg, 18—25 ft-lb)
Fuel Filter
Low pressure side (In-tank filter)
Refer to page 4C—60.
76G04C-124
High pressure side
The fuel filter must be replaced at the intervals out-
lined in the maintenance schedule.
Warning
Always work away from sparks or open
flames.
1. Disconnect the fuel hoses from the fuel filter.
2. Remove the fuel filter and the bracket.
3. Install a new filter and the bracket.
4. Connect the fuel hoses.
Note
When installing the filter, push the fuel hoses
fully onto the fuel filter and secure them with
spring clamps.
4C-64

4D
FUEL AND EMISSION
CONTROL SYSTEM
(DIESEL)
OUTLINE 4D— 2
SPECIFICATIONS 4D— 2
TROUBLESHOOTING GUIDE 4D— 3
ON-VEHICLE MAINTENANCE 4D— 4
AIR CLEANER ELEMENT 4D— 4
WATER DRAINING 4D— 4
AIR BLEEDING 4D— 4
INJECTION TIMING 4D— 5
IDLE SPEED 4D— 6
EXHAUST SMOKE 4D— 6
INTAKE AIR SYSTEM 4D— 7
STRUCTURAL VIEW 4D— 7
AIR DUCT AND AIR CLEANER 4D— 8
INTAKE MANIFOLD 4D— 9
SUPERCHARGING SYSTEM (RF-CX) 4D-10
TROUBLESHOOTING GUIDE 4D—10
ON-VEHICLE INSPECTION 4D—11
COMPREX SUPERCHARGER 4D—13
STARTING VALVE 4D—15
INTERCOOLER 4D—16
BOOST AIR TEMPERATURE SENSOR 4D—17
EXHAUST SYSTEM 4D—18
STRUCTURAL VIEW 4D—18
EXHAUST MANIFOLD 4D—19
EXHAUST PIPE AND MAIN SILENCER .... 4D—20
FUEL SYSTEM 4D—21
STRUCTURAL VIEW 4D—21
FUEL FILTER 4D—22
SEDIMENTER (GENERAL) 4D—22
WATER LEVEL SENSOR 4D—23
INJECTION PUMP 4D—24
INJECTION NOZZLE 4D—31
FUEL TANK 4D—34
76G04D-001

4D ON-VEHICLE MAINTENANCE
ON-VEHICLE MAINTENANCE
76G04D-004
AIR CLEANER ELEMENT
Check the air cleaner element for excessive dirt, dam-
age, or oil. Replace if necessary.
Caution
(Wet type)
Do not clean the air cleaner element with com-
pressed air, replace if necessary.
(Dry type)
When cleaning the air cleaner element, blow
dust off from the inside first, then blow off the
outside.
(General)
1. Loosen the drain plug of the sedimenter and let
the water drain. If necessary loosen the air bleed-
ing plug.
2. Bleed air from the sedimenter.
AIR BLEEDING
From Fuel Tank to Fuel Filter
1. Loosen the air bleeding plug of the fuel filter.
2. Pump the priming pump until no air bubbles flow
from the air bleeding plug hole.
3. Depress the priming pump and tighten the air
bleeding plug.
Note
Open only the air bleeding plug of the filter.
From Fuel Filter to Injection Pump
Pump the priming pump until it becomes hard to
pump.
76G04D-007
WATER DRAINING
(ECE)
1. Loosen the drain plug of the fuel filter.
2. Pump the priming pump.
3. Bleed air from the fuel filter.
4D—4

ON-VEHICLE MAINTENANCE 4D
INJECTION TIMING
1. Disconnect the negative battery cable.
2. Release the CSD using the screw driver.
3. Remove the cover on the clutch housing.
4. Turn the flywheel and set the indicator at TDC.
5. Disconnect the injection pipes from the injection
pump.
76G04D-008
6. Remove the hydraulic head plug from the injec-
tion pump.
7. Mount the SST into the plug hole on the hydraulic
head so the tip of the dial gauge pointer touches
the plunger end of the pump and the dial gauge
indicates approx. 2.0 mm (0.08 in).
76.G04D-009
8. Turn the crankshaft slowly counterclockwise to
30—50° BTDC.
9. Make sure the dial indicator pointer no longer
moves by slightly turning the crankshaft.
10. Set the dial gauge scale to Zero at the pointer.
76G04D-010
11. Turn the crankshaft clockwise to align the indica-
tor pin at ATDC 1° (RF-CX), TDC 0° (RF-N).
12. Read the dial gauge.
Cam lift: 0.98—1.02 mm (0.038—0.040 in)
13. If not within the specification, adjust the injection
timing. (Refer to page 4D—24.)
76G04D-011
4D-5

4D ON-VEHICLE MAINTENANCE
IDLE SPEED
1. Warm up the engine to normal operating tem-
perature.
2. Be sure the A/C switch is OFF.
3. Connect a tachometer and check the engine
speed.
Idle speed: 720 :
20
rpm
76G04D-012
4. If necessary, adjust the idle by turning the idle ad-
justing screw.
76G04D-013
Fast Idle Speed (A/C equipped model)
1. Turn ON the A/C switch and blower motor switch.
2. Check the engine speed.
Fast idle speed: 725 ± 25 rpm
3. If necessary, turn the adjusting screw on the idle-
up actuator, and adjust the fast idle speed.
76G04D-014
EXHAUST SMOKE
Increase and decrease the engine speed several
times and check that there is no black smoke.
If
there
is, refer to the Troubleshooting Guide.
76G04D-015
4D—6

4D FUEL SYSTEM
Overhaul
Service point
1. For overhauling the injection pump, see the "Repair Service and Maintenance" manual prepared
by the manufacturer of the pump.
2. If the inside of the injection pump is disassembled for maintenance, be sure to properly use the
checking device such as the pump tester.
76G04D-068
Manufacturer of Injection Pump:
Diesel Kiki Co., Ltd.
63G04D-312
Construction of VE Injection Pump
Servo diaphragm
Boost compensation stopper
p^ ^-Fue! cut solenoid
valve
'Cold start device
63G04D-313
4D—28

CLUTCH
OUTLINE 6— 2
STRUCTURAL VIEW 6— 2
SPECIFICATIONS 6— 3
TROUBLESHOOTING GUIDE 6— 3
ON-VEHICLE MAINTENANCE 6— 4
FLUID LEVEL 6— 4
PEDAL HEIGHT 6— 4
PEDAL FREEPLAY 6— 4
CLUTCH PEDAL 6— 5
REMOVAL 6— 5
INSPECTION 6— 6
INSTALLATION 6— 6
ADJUSTMENT 6— 6
CLUTCH MASTER CYLINDER 6— 7
REMOVAL 6— 7
DISASSEMBLY 6—8
INSPECTION 6— 9
ASSEMBLY 6— 9
INSTALLATION 6—11
CLUTCH RELEASE CYLINDER 6—11
REMOVAL 6—12
DISASSEMBLY 6-12
INSPECTION 6—13
ASSEMBLY 6—13
INSTALLATION 6—14
AIR BLEEDING 6—14
CLUTCH AND FLYWHEEL 6—15
REMOVAL 6—15
INSPECTION 6—16
INSTALLATION 6—19
76G06X-001

6 ON-VEHICLE MAINTENANCE
6-4
ON-VEHICLE MAINTENANCE
FLUID LEVEL
1. Clean the area around the reservoir and the reser-
voir cap.
2. Check the fluid level. If the level is near or below
the "MIN" mark, add clutch fluid to the "MAX"
mark.
Fluid specification:
DOT-3 or DOT-4
(FMVSS 116, or SAE J1703)
PEDAL HEIGHT
Inspection
Measure the distance from the upper center of the
pedal pad to the firewall and ensure that the distance
is within specification.
Pedal height A:
216.5—221.5 mm (8.524—8.720 in)
Adjustment
To adjust the pedal height, loosen locknut and turn
stopper bolt or clutch switch.
PEDAL FREEPLAY
Inspection
Depress the pedal lightly by hand and measure the
freeplay to ensure that it is within specification.
Pedal freeplay: 5—13 mm (0.20—0.51 in)
Adjustment
1. Adjust the free play by loosening locknut C and
turning push rod D.
2. Check that the distance from the floor to the cen-
ter of the upper surface of the pedal pad is as
specified or more when the clutch is fully dis-
engaged.
Disengagement height B:
LHD 68 mm (2.7 in)
RHD 85 mm (3.3 in)
3. Tighten locknut C after adjustment.