TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 804 of 1015
TM 9-2320-272-24-1
3-161. FRONT SPRING AND MAIN LEAF REPLACEMENT
THIS TASK COVERS:
a.
Front Spring Removal
b.
Front Spring Main Leaf Removal
c.
Front Spring Main Leaf Installation
d.
Front Spring Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-272-10
TOOLS
TM 9-2320-272-24P
EQUIPMENT CONDITION
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 145)
C-clamps
MATERIALS/PARTS
l
Parking brake set (TM 9-2320-272-10).
l
Air reservoirs drained (TM 9-2320-272 10).
l
Right splash shield removed (TM 9-2320-272-10).
l
Shock absorber removed (para. 3-166).
l
Front wheels removed (TM 9-2320-272-10).
Cotter pin (Appendix D, Item 49)
Two locknuts (Appendix D, Item 285)
Four lockwashers (Appendix D, Item 362)
Spring center bolt (Appendix D, Item 670)
Spring center nut (Appendix D, Item 669)
Antiseize tape (Appendix C, Item 72)
Cap and plug set (Appendix D, Item 14)
Powdered graphite (Appendix C, Item 31)
a. Front Spring Removal
NOTE
Steps 1 through 5 apply to right side of spring only.
1.
Bend tabs (4) of steering cylinder dustcover (3) clear of steering cylinder (7) and right side spring
hanger (1).
2.
Remove cotter pin (6) from steering cylinder (7). Discard cotter pin (6).
3.
Back out cylinder adjusting plug (5).
4.
Remove steering cylinder (7) from ball stud (2).
5.
Remove steering cylinder dustcover (3) from ball stud (2).
CAUTION
Cap or plug all openings immediately after disconnecting lines or
hoses to prevent contamination. Failure to do so may result in
brake system damage.
6.
Disconnect two air lines (15) from service brake chamber (14).
7.
Place jack stands under frame (17) at rear of hanger (10).
NOTE
Support axle when removing U-bolts.
8.
Remove four nuts (13), lockwashers (12), and shock absorber mounting plate (11) from two
U-bolts (9). Discard lockwashers (12).
NOTE
l
Frame may have to be raised further to provide clearance for
U-bolts removal.
l
If U-bolts must be forced, place a piece of wood between
hammer and bolt to prevent damage.
3-440
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