TM 9-2320-260-34-2
15-59. LIFTGATE CYLINDER MAINTENANCE (M820A2)
THIS TASK COVERS:
d. Assembly
a. Removal
e. Installation
b. Disassembly
c. Cleaning and Inspection
INITIAL SETUP
MATERIALS/PARTS (Contd)
APPLICABLE MODELS
M820A2
TOOLS
REFERENCES (TM)
General mechanic's tool kit
LO 9-2320-260-12
TM 9-2320-260-10
TM 9-2320-260-34P-2
EQUIPMENT CONDITION
MATERIALS/PARTS
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
Perform this task in a clean, dust-free area. Failure to do so may
result in damage to equipment.
1.
With liftgate cylinder (3) positioned vertically in vise, loosen setscrew (15) and remove retaining
nut (17) and piston rod (4) from liftgate cylinder (3).
2.
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).
3.
Remove O-ring (24) and seal (23) from piston (25). Discard O-ring (24) and seal (23).
4.
Remove O-ring (18), seal (19), and O-rings (21) and (22) from front head (20). Discard
5.
O-rings (18), (21), (22), and seal (19).
Remove two grease fittings (26) from liftgate cylinder (3).
6.
7,
Using arbor press, remove bushing (28) from piston rod (4). Discard bushing (28).
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