Hummer H1 (1992-1998). Manual - part 41

2-140.12

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

This task covers:

a.

Mounting Fuel Injection Pump

c.

Removal of Fuel Injection Pump 

on Test Stand

from Test Stand

b.

Test Stand Setup Procedures

INITIAL SETUP:

Tools

General mechanic’s tool kit:

automotive (Appendix E, Item 1)

Special Tools

Adapter Kit 74-8033 consisting of:

Adapter plate (Appendix E, Item 57)
Advance indicator (Appendix E, Item 58)
Alignment gauge (Appendix E, Item 59)
Barring tool (Appendix E, Item 60)
Connector (Appendix E, Item 61)
High-pressure lines (Appendix E, Item 62)
Hose assembly (Appendix E, Item 63)
Hose assembly (Appendix E, Item 64)
Male pipe fitting (Appendix E, Item 65)
Quick-connect plug (Appendix E, Item 66)
Test adapter (Appendix E, Item 67)
Test lead, black (Appendix E, Item 68)
Test lead, red (Appendix E, Item 69)
Throttle arm positioner assembly 

(Appendix E, Item 70)

Tubing (Appendix E, Item 71)

Test Equipment

Test stand, model A8022

Materials/Parts

Three 5/16-18x1 hex-head capscrews 

(Appendix D, Item 55)

Three 3/8-16x1 hex-head capscrews 

(Appendix D, Item 56)

Calibration fluid (Appendix B, Item 4)

Manual References

NOT E

The following calibration procedures apply to fuel injection pumps
DB 2829-4523, DB 2829-4879, or DB 2831-5149 only.

a.

Mounting Fuel Injection Pump on Test Stand

NOT E

Prior to installing fuel injection pump to drive coupling, ensure
alignment gauge is installed.

1.

Insert alignment gauge into test stand drive coupling.

2.

Install fuel injection pump (1) on adapter plate (6) and secure with three 5/16-in. washers (3) and
5/16-18x1 hex-head capscrews (2).

3.

Position fuel injection pump (1), with flange mounting bracket (5) installed, to test stand drive
coupling.

4.

Using barring tool, rotate driveshaft (12) until tapped holes on pump-mounted drive hub (7) are
aligned with slots in test stand drive coupling.

5.

Install three 3/8-in. washers (8), 3/8-in. lockwashers (9), and 3/8-16x1 hex-head capscrews (10) in
slots and mounting holes on test stand drive coupling and pump-mounted drive hub (7). Remove
barring tool.

6.

Tighten two 3/8-16x1 hex-head capscrews (4) that secure flange mounting bracket (5) to
bedplate (11). Remove alignment gauge.

Change 1           2-140.13

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)

ALIGNMENT GAUGE

BARRING 

TOOL

TEST STAND DRIVE COUPLING

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)

7.

Install test adapter and connector on fuel inlet port (2) of fuel injection pump (1).

8.

Connect one end of hose assembly to connector and insert other hose end into calibration fluid
supply quick-connect on front panel of test stand (3).

9.

Remove screw (8), tab (7), washer (6), and O-ring (5) from fuel injection pump transfer port (4).

10.

Position test adapter on fuel injection pump transfer test port (4) and secure into position with
existing O-ring (5), tab (7), and washer (6) removed in step 9.

11.

Install quick-connect plug into test adapter.

12.

Connect one end of rubber hose assembly (9) to quick-connect plug and other hose assembly end to
auxiliary pressure quick-connect on front panel of test stand (3).

13.

Install male pipe fitting on fuel injection pump (1).

14.

Connect one end of tubing to male pipe fitting on fuel injection pump (1) and other end to calibration
fluid push-on connector on front panel of test stand (3).

C A U T I O N

When installing high-pressure delivery lines on fuel injection
pump, use two wrenches to prevent damage to discharge fittings.

15.

Install eight high-pressure delivery lines on discharge fittings (10) of fuel injection pump (1).

2-140.14          Change 1

TUBING

MALE PIPE

FITTING

TEST

ADAPTER

CONNECTOR

HOSE ASSEMBLY

PUSH-ON 

CONNECTOR

1

2

3

QUICK-

CONNECT

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         2-140.15

TEST ADAPTER

QUICK-CONNECT PLUG

AUXILIARY 
PRESSURE 
QUICK-CONNECT

1

4

5

6

7

8

9

1

10

HIGH-PRESSURE

DELIVERY LINE

3