TM 9-2320-260-34-1
5-19. UPPER SPRING PACK MAINTENANCE (Contd)
1.
For general inspection procedures, refer to para. 2-9.
2.
Inspect spring pack housing (13) for cracks, breaks, and wear. Replace spring pack housing (13)
if cracked, broken, or worn.
3.
Measure inside diameter of two spring pack housing bushings (12). Inside diameter should be
0.560-0.563 in. (14.22-14.30 mm). Replace spring pack housing bushings (12) if inside diameter
exceed limits.
NOTE
Perform steps 4 and 5 if spring pack housing bushings require
replacement.
4.
Using arbor press, remove two spring pack housing bushings (12) from spring pack housing (13).
Discard spring pack housing bushings (12).
5.
Using arbor press, install two new spring pack housing bushings (12) on spring pack housing (13).
Ensure spring pack housing bushings (12) are flush with surface of spring pack housing (13).
6.
Using spring tester, check tension of high-speed spring (24). Spring tension should be 0.28-0.36 lb
(0.13-0.16 kg) at 0.265 in. (6.731 mm). Replace high-speed spring (24) if tension is not within limits.
7.
Using spring tester, check tension of idle spring (21). Spring tension should be 9.2-11.2 lb
(4.17~5.08 kg at 1.12 in. (28.4 mm). Replace idle spring (21) if tension is not within limits.
1. Install two setscrews (4), washers (3), nuts (2), washers (5), and caps (6) on spring pack housing (13).
NOTE
Safety wire is not installed until fuel pump calibration (para. 5-25).
2. Install two new O-rings (11) on throttle shaft (7).
3. Position throttle stop (14) in spring pack housing (13) and insert throttle shaft (7) through spring
pack housing (13) and throttle stop (14).
4. Install setscrew (15) on throttle stop (14) and throttle shaft (7).
5. Install throttle levers (10) and (16) on throttle shaft (7) in marked positions. Tighten two nuts (8)
and screws (9).
1. Install plunger (20), idle spring (21), and spring seat (22) in governor barrel (19) with new retaining
ring (23).
2. Position spring guide (26), shim(s) (25), and high-speed spring (24) in spring pack housing (13).
3. Install new gasket (29) and spring pack housing (13) on fuel pump (17) with four washers (27) and
screws (28).
4. Install spring (30) on throttle lever (10.) and bracket (18).
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