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306287W 7
Service
Lubrication
Every two to six weeks, take the cap (20) off the riser
tube (14 or 28) and put a few drops of light, high grade
motor oil on the inside surface of the tube to lubricate
the leather packing (10). See F
IG
. 6. When replacing the
cap, torque to 20-40 ft-lb (37-54 N•m).
Seals and Gaskets
To replace the leather cup packings (10), screw the
bearing housing (25) out of the riser tube (14 or 28) and
slide the tube up off the piston (11). See F
IG
. 6. Screw
the piston retainer capscrew (21) out of the piston body
and remove the parts. Inspect parts for wear and dam-
age and replace as necessary.
NOTE: When replacing packings, install a new spreader
(5). This will increase the life of the packings.
Soak new leather packing (10) in light oil, and put lithium
grease on the inside surface of the tube. Re-assemble
in the reverse order. Apply Loctite
®
542 thread sealant
to the internal threads of the piston body (11) and the
threads of the capscrew (21). Torque the capscrew to
15-20 ft-lb (20-27 N•m).
To replace the guide tube gasket (19), screw the guide
tube (13 or 29) out of the elevator base (17). Take the
gasket out. See F
IG
. 6. Be careful not to damage the
outside bearing surface of the guide tube. Put a new
gasket into the base. Put PTFE tape on the threads of
the guide tube and screw it into the base. Torque to
90-130 ft-lb (122-175 N•m).
Push-Pull Valve
Remove the valve guide (71), washer (64), o-ring (66*)
and seal (67*). Pull the assembled valve parts out of the
valve body (70). See the Parts Drawing on page 10. Dis-
assemble parts, clean and inspect. Re-assemble the
valve, using new parts as necessary.
NOTICE
Be careful not to dent or damage the riser tube (14 or
28). Dents may cause the elevator to bind, making
operation impossible.
F
IG
. 6
Torque to 20-40 ft-lb (27-54 N•m)
Torque to 15-20 ft-lb (20-27 N•m)
Torque to 90-130 ft-lb (122-175 N•m)
Torque to 30-60 ft-lb (40-80 N•m)
Apply lubricant to inside surface
Apply tape
Apply Loctite
®
542 Sealant to threads
1
2
3
4
5
6
7
06532
8
10
20
21
17
19
12 or 24
25
4 7
13 or 29
3 6
2 7
1
5
4
9 or 18
14 or 28
5