TM 9-2320-260-34-2
16-14. BOOM ELEVATING CYLINDERS MAINTENANCE (M816) (Contd)
a. Removal
Clean area around hoses and lines before removal to prevent
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entry of dirt. Damage will occur if dirt or dust enters system.
Cap or plug all openings immediately after disconnecting lines
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and hoses to prevent contamination. Remove caps or plugs
prior to installation. Failure to do so may result in damage to
equipment.
NOTE
Left and right elevating cylinders are maintained the same. This
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procedure covers the right elevating cylinder.
q Assistance is needed when removing elevating cylinder.
Tag hydraulic hoses for installation.
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Have drainage container ready to catch oil.
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1.
Install chain on boom (1) and attach to lifting device. Remove slack from chain.
Disconnect hose (12) from elbow (4) and check valve (13).
2.
Disconnect hose (19) from elbow (14). Tie hose (19) out of the way.
3.
WARNIN6
All personnel must stand clear during lifting operations.
A swinging or shifting load may cause injury to personnel.
Ensure lifting capacity is greater than weight (160 lb (73 kg)) of
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boom elevating cylinders. Failure to do so may result in injury to
personnel or damage to equipment.
4.
Raise boom (1). Release shipper braces (2) from boom (1) and install on wrecker body (3).
Lower boom (1) and remove lifting device and chain.
5.
Install chain on elevating cylinder (5) and attach to lifting device. Take up slack in chain.
6.
7.
Remove screw (10), lockwasher (9), washer (8), and keeper pin (7) from bracket (6) and piston rod
trunnion (11). Discard lockwasher (9).
8.
Remove cotter pin (16) from pin (18). Discard cotter pin (16).
9.
Using hammer and drift, remove pin (18) from bracket (17) and cylinder housing trunnion ( 15).
10.
Using prybar and lifting device, remove elevating cylinder (5) from brackets (6) and (17).
11.
Remove lifting device and chain from elevating cylinder (5).
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