TM-5-2330-378-14-P

SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1

TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

JUNE 1999
TM-5-2330-378-14-P

  TM-5-2330-378-14-P - Page 310 of 524

TM 5-2330-378-14&P
5-19. GOOSENECKHINGEPINREPLACEMENT(M870).
ThisTaskCovers:
a.
Removal
b.
Installation
Initial Setup:
Tools/Test
Equipment:
Equipment
Conditions:
• Common
no. 1 tool set (item 6, Appendix
B)
Gooseneck in upright position (para 2-8).
• Crane, wheel mounted (Item 2, Appendix B)
• Field maintenance tool set (Item 4, Appendix B)
Personnel Required:
Two
• Tool kit, general mechanic's:
automotive
(item 7, Appendix B)
References:
TC 9-237
Materials/Parts:
- Retaining ring (item 24,
Appendix 1)
a.
REMOVAL
1.
Using crane, lift front of semitrailer.
2.
Place two one-foot-high wood blocks (1) under two landing pads (2). Lower front of semitrailer onto blocks
(1).
3.
Cut tack weld from retaining ring (3) behind semitrailer frame (4) on gooseneck hinge pin (5). Removeretaining
ring (3) from hinge pin (5). Grind weld to surface of hinge pin (5). Discard retaining ring.
4.
Using crane, lift gooseneck (6) until two locking pins (7) are loose.
WARNING
Do not work under gooseneck unless lockpins are in place. Working under goose-
neck when lockpins are not in place could result in injury or death.
5.
Remove two lockpins (para 2-10).
6.
Lower gooseneck (6) until fully extended.
WARNING
Placement of jacks is extremely important in this procedure. Failure to place jacks
properly could result in injury or death.
7.
Place hydraulic jack under front and rear ends of upper deck side rail (8).
8.
Raise hydraulic jack at front of side rail (8) until gooseneck (6) starts to lift.
9.
Raise hydraulic jack at rear of side rail (8) until hinge pin (5) can be turned with pipe wrench.
10.
Remove lubrication fitting (9) from hinge pin (5).
NOTE
Removal of hinge pin requires the use of a slide hammer. Use a nut that will fit threads
on slide hammer rod.
11.
Put nut (10) in place over lubrication fitting hole (11) and have assistant hold it in place with wooden dowel.
Weld nut (10) to hinge pin (5).
5-48


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