TM 9-2320-260-34-2
16-14. BOOM ELEVATING CYLINDERS MAINTENANCE (M186) (Contd)
Install new seal (16) on packing nut (15).
1.
Coat piston rod (11) with lubricating oil and install packing nut (15) on piston rod (11).
2.
Using bearing replacer and handle, install new bearing sleeve (13) in cylinder head (9).
3.
Coat new piston rod packing (14) with GAA grease and install in cylinder head (9). Ensure elements
4.
of piston rod packing (14) face away from toothed end of cylinder head (9).
Install new packing (12) on cylinder head (9).
5.
Install cylinder head (9) on piston rod (11).
6.
Using spanner wrench, install packing nut (15) on cylinder head (9). Tighten packing nut (15) until
7.
a distance of 0.125 in. (3.18 mm) remains.
Place piston rod trunnion (10) in vise.
8.
Coat two new piston rings (6) with GAA grease and install on piston (7).
9.
Install new cup seal (5) on piston (7).
10.
11.
Install new packing (8), piston (7), retainer washer (4), and washer (3) on piston rod (11) with
nut (2).
Install new safety wire (1) on piston rod (11) and nut (2).
12.
Remove piston rod (11) from vise.
13.
Coat bore of cylinder housing (18) with lubricating oil.
14.
NOTE
Assistant will help with step 15.
Insert piston (7) and piston rod (11) in cylinder housing (18). Ensure piston ring seals (6) stay seated
15.
and do not fold over.
Using spanner wrench, install cylinder head (9) on cylinder housing (18).
16.
Wrap male threads of elbow (19) and check valve (20) with antiseize tape.
17.
Install elbow (19) and check valve (20) on cylinder housing (18). Tighten to previously recorded
18.
position.
Install grease fittings (17) on cylinder housing trunnion (21) and piston rod trunnion (10).
19.
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