Servis-Rhino F-4123C - Manual (Page 96)

MAINTENANCE
1585 01/11 Maintenance Section 5-6
© 2011 Alamo Group Inc.
MAINTENANCE
Lift and Bucket Cylinder Disassembly
1. Hold cylinder tube (13) stationary and use a spanner wrench to unscrew cylinder head (4).
2. Pull shaft (1), with all assembled parts, out of cylinder tube (13).
3. Remove elastic locknut (12) from end of shaft and slide cylinder piston (10) and cylinder head (4) off shaft.
4. Remove piston wear ring (11), piston seal (8), and o-ring (7) from outside grooves on piston(10).
5. Remove wiper seal (2), rod seal (3) and wear ring (5) from inside of cylinder head and o-ring (7) with
backup washer (6) from groove on outside of head.
6. Clean all parts including cylinder tube, in a suitable cleaning solvent, then use air pressure to blow any dirt
or excess solvent from all parts.
7. Examine all parts for wear or damage and replace, if necessary.
Lift and Bucket Cylinder Reassembly
NOTE: Be careful not to damage seals and o-rings on edges or holes in cylinder tube. Inspect and remove
burrs and sharp edges if necessary before reassembly.
1. Place rod seal (3) into groove inside cylinder head.
NOTE: Lips of seal (3) must face inward and seal must be firmly seated in groove.
2. Install wiper seal (2) with lip of seal facing out and flush with top of cylinder head (4). Install wear ring (5)
inside other end of head (4).
3. Place o-ring (7) with back-up washer (6) in groove on outside of head. Back-up washer must be on rod
side.
4. Remove sharp edges on outer edge of threaded end of shaft (1). Lubricate wiper seal (2) and rod seal (3)
in head and carefully slide head onto shaft.
5. Place o-ring (9), piston seal (8) and piston wear ring (11) in grooves on outside of piston (10).
NOTE: For easier installation, place piston seal (8) in 120º F water to warm seal.
6. Slide piston (10) onto threaded end of shaft and install locknut (12). For bucket cylinders, tighten locknut
(12) to 150ft. lbs. Tighten locknut to 300 ft. lbs. on lift cylinders. Use thread lock (Locktite®) on threads.
7. Lubricate piston wear ring (11) and piston seal (8) on piston, o-ring (7), on head (4) and inside of cylinder
tube (13), then carefully slide piston and head into cylinder tube (13).
8. Install cylinder head ((4) into cylinder tube (13).