TM-9-2320-260-34-2
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 2 OF 2
JULY 1994
TM-9-2320-260-34-2 - Page 287 of 863
15-59. LIFTGATE CYLINDER MAINTENANCE (M820A2)
THIS TASK COVERS:
a. Removal
d. Assembly
b. Disassembly
e. Installation
c. Cleaning and Inspection
INITIAL SETUP
APPLICABLE MODELS
M820A2
TOOLS
General mechanic’s tool kit
(Appendix B, Item 1)
Arbor press (Appendix B, Item 7)
Vise (Appendix B, Item 38)
MATERIALS/PARTS
Two pins (Appendix D, Item 318)
Two cotter pins (Appendix D, Item 33)
O-ring (Appendix D, Item 275)
O-ring (Appendix D, Item 277)
O-ring (Appendix D, Item 279)
O-ring (Appendix D, Item 281)
Seal (Appendix D, Item 414)
Seal (Appendix D, Item 417)
MATERIALS/PARTS (Contd)
Bushing (Appendix D, Item 7)
Lubricating oil (Appendix C, Item 21)
REFERENCES (TM)
LO 9-2320-260-12
TM 9-2320-260-10
TM 9-2320-260-34P-2
EQUIPMENT CONDITION
Parking brake set (TM 9-2320-260-10).
Liftgate lowered to ground level
(TM 9-2320-260-10).
Drain hydraulic system (LO 9-2320-260-12).
SPECIAL ENVIRONMENTAL CONDITIONS
Perform this task in clean, dust-free area.
1. Remove hydraulic tubing (12) and (13) from adapter (11) and fluid restrictor (14).
2. Remove adapter (11), elbow (10), and nipple (9) from liftgate cylinder (3).
3. Remove fluid restrictor (14) from liftgate cylinder (3).
4. Remove two pins (1) and straight pin (8) from liftgate cylinder (3) and main frame (2). Discard pins (1).
5. Remove two cotter pins (5) and straight pin (7) from piston rod (4) and lift frame (6). Discard cotter
pins (5).
6. Remove liftgate cylinder (3) from main frame (2).
b. Disassembly
CAUTION
1.
2.
3.
4.
5.
6.
7,
Perform this task in a clean, dust-free area. Failure to do so may
result in damage to equipment.
With liftgate cylinder (3) positioned vertically in vise, loosen setscrew (15) and remove retaining
nut (17) and piston rod (4) from liftgate cylinder (3).
With piston rod (4) positioned vertically in vise, remove nut (27), piston (25), and front head (20)
from piston rod (4).
Remove setscrew (15) and grommet (16) from retaining nut (17).
Remove O-ring (24) and seal (23) from piston (25). Discard O-ring (24) and seal (23).
Remove O-ring (18), seal (19), and O-rings (21) and (22) from front head (20). Discard
O-rings (18), (21), (22), and seal (19).
Remove two grease fittings (26) from liftgate cylinder (3).
Using arbor press, remove bushing (28) from piston rod (4). Discard bushing (28).
15-226
TM 9-2320-260-34-2
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