Hummer H1 (1992-1998). Manual — part 42
2 - 3 5 . 3 . (6.2L or 6.5L) FUEL INJECTION PUMPS (DB2829-4523, DB2829-4879, or
DB2831-5149) CALIBRATION USING FUEL INJECTION PUMP TEST STA N D
(FTIS) MODEL A8022 (Cont’d)
2-140.16 Change 1
16.
Position throttle arm positioner assembly (3) on bedplate (7) and throttle lever (1).
NOT E
When installing advance indicator, ensure the flat on pointer end
engages into the cam ring slot on fuel injection pump.
17.
Remove two screws (6), timing cover (5), and gasket (4) from fuel injection pump (2) and install
advance indicator with two screws (6).
18.
Remove screw plug from advance indicator block and install quick-connect on advance indicator
block (8).
19.
Attach one end of rubber hose assembly to quick-connect and the other hose assembly end to
auxiliary pressure quick-connect plug on front panel of test stand.
20.
Connect positive red test lead to DC power supply socket marked (+) on test stand, and attach the
alligator clip end of red test lead to the electric shutoff solenoid terminal (9) on fuel injection
pump (2).
21.
Connect black lead to DC black socket marked “P” on test stand and connect alligator clip end of
black lead to ground terminal (10) on fuel injection pump (2).
22.
After installation and hookup of the fuel injection pump has been completed, inspect pump, all
hoses, and related hardware connections before beginning pump calibration. Review operation test
procedures for the FTIS prior to calibrating the fuel injection pump.
2
3
4
5
6
1
7
6
ADVANCE
INDICATOR
2 - 3 5 . 3 . (6.2L or 6.5L) FUEL INJECTION PUMPS (DB2829-4523, DB2829-4879, or
DB2831-5149) CALIBRATION USING FUEL INJECTION PUMP TEST STA N D
(FTIS) MODEL A8022 (Cont’d)
Change 1 2-140.17
TEST STAND
FRONT PANEL
AUXILIARY PRESSURE
QUICK-CONNECT
QUICK-DISCONNECT
SCREW PLUG
TEST STAND
8
9
2
10
RUBBER HOSE
ASSEMBLY
DC POWER SUPPLY
SOCKET
DC BLACK SOCKET
BLACK TEST LEAD
POSITIVE RED TEST LEAD
2-140.18 Change 1
2 - 3 5 . 3 . (6.2L or 6.5L) FUEL INJECTION PUMPS (DB2829-4523, DB2829-4879, or
DB2831-5149) CALIBRATION USING FUEL INJECTION PUMP TEST STA N D
(FTIS) MODEL A8022 (Cont’d)
b.
Test Stand Setup Procedures
1. Cathode Ray Tube (CRT) Monitor
2. Injection Pump/Auxiliary Selector
3. DC Supply Selector
4. Printer Switch
5. Accumulator Switch
6. Low-Limit Thumbwheel
7. Outlet Number
8. Number of Outlets
9. Stop
10. Mode Selector
11. Ratio Switch
12. Units Switch
13. Hi-Limit Thumbwheel
14. Stroke
15. Pump Rotation Selector
16. Speed Select Control
17. Main Drive Off
18. Main Drive On
19. Lube Oil System Off
20. Calibration Fluid System Off Pushbutton
21. Nominal Temperature Thumbwheel
22. Stop
23. Reservoir Bulkhead Selector
24. Calibration Fluid System On Pushbutton
25. Lube Oil System On
26. Calibration Fluid System
27. Calibration Fluid Pressure
28. Lube Pressure
Change 1 2-140.19
2 - 3 5 . 3 . (6.2L or 6.5L) FUEL INJECTION PUMPS (DB2829-4523, DB2829-4879, or
DB2831-5149) CALIBRATION USING FUEL INJECTION PUMP TEST STA N D
(FTIS) MODEL A8022 (Cont’d)
1.
Set test stand in accordance with the following checklist and instructions in steps 2 through 25.
ITEM
SETTING
Bypass Valve
Open Position
Calibration Fluid System
On
Fluid Selector Valve
Injection Pump
Accumulator Switch
Right
Fluid Shutoff Valve
On
Mode Selector
Auto
Ratio Switch
1:2
Units Switch
mm
3
/stroke
Stroke
50
Throttle
WOT
Number of Outlets
8
Outlet Number
Between 1 and 8
Low-Limit Thumbwheel
10.0
Hi-Limit Thumbwheel
Limit Thumbwheel 40.0
Pump Rotation Selector
Counterclockwise
Temperature Select
Bulkhead
Nominal Temperature Thumbwheel
44.7
Master Power Switch
On
DC Supply Selector
17.6 Volts Energize Electric Shutoff Solenoid (ESO)
Lube Pressure
4.5 to 5.5 psi
Lube Oil System
Pushbutton On
Main Drive
Pushbutton On
Printer Switch
On
Speed Select Control
Increase/Decrease Control
2.
3.
Secure throttle positioner arm in Wide Open Throttle (WOT) position.
4.
Turn calibration fluid pressure regulator fully counterclockwise.
5.
Press calibration fluid system on pushbutton.
6.
Adjust calibration fluid pressure regulator knob clockwise until 4.5-5.5 psi (31-38 kPa) is indicated
on the Cathode Ray Tube (CRT) monitor. Apply 17.6 volts by adjusting the variable DC voltage
supply knob to energize the electric shutoff solenoid.
CAUTION
Be aware that under no circumstances should the transfer pump
pressure exceed 130 psi (896 kPa). Excess pressure will damage
pump.
7.
Turn on main drive system by pressing main drive on pushbutton and holding button depressed for
a minimum of three seconds. Increase pump speed to approximately 150 rpm to prime transfer
pump and bleed air from the high-pressure fuel line nuts at each test nozzle.
8.
Increase pump speed to 1000 rpm. Ensure throttle lever is secured in WOT position. Run pump
approximately 10 minutes to warm the calibration fluid to 110°-115°F (43.3°-46.1°C) and bleed all
air from test stand and fuel pump. Observe transfer pump pressure reading on CRT monitor. It
should be 70-76 psi (483-524 kPa).
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