RHINO RHINO 7214 MSL, Operator'S Manual

Page: 36 / 44

F-3778-12-04 Maintenance Section 5-3
CYLINDER SERVICE
Loader cylinders are designed to be reliable and easy to
service. If a cylinder should malfunction during warranty
period, return complete cylinder assembly, without
disassembling, to your authorized service department or
contact your authorized service department for
instructions. Unauthorized disassembly of a cylinder in
warranty period will VOID WARRANTY.
Following is an outline procedure for disassembling and
reassembling cylinders.
LIFT CYLINDER DISASSEMBLY
1. Remove cylinder from loader.
2. Hold cylinder tube (13) stationary and pull wire ring
(14) out through slot.
3. Pull shaft (1), with all assembled parts, out of cylinder
tube (13).
NOTE: Resistance will be felt until piston seal (8)
slides over wire retaining ring groove.
4. Remove elastic lock nut (12) from end of shaft and
slide cylinder piston (10) and cylinder head (4) off
shaft.
5. Remove piston wear ring (11), piston seal (8), and o-
ring (9) from outside grooves on piston (10).
6. Remove wiper seal (2), rod seal (3), and wear ring (5)
from inside of cylinder head (4) and o-ring (7) with
backup washer (6) from groove on outside of head.
7. 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.
8. Examine all parts for wear or damage and replace, if
necessary.
LIFT 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 (4).
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 backup washer (6) in groove on
outside of head (4). Backup washer must be to 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 (4) and carefully slide head (4) 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
120°F water to warm seal.
6. Slide piston (10) onto threaded end of shaft and install
elastic lock nut (12). Tighten elastic lock nut to 575
ft.·lbs. torque.
7. Lubricate piston wear ring (11) and piston seal (8) on
piston (10), o-ring (9) on head (4) and inside of cylinder
tube (13), then carefully slide piston and head into
cylinder tube (13).
8. Insert wire retaining ring (14) into slot in cylinder tube
(13). Apply pressure to wire ring to thread it into groove
while turning cylinder head.
© 2004 Alamo Group Inc.
MAINTENANCE
MAINTENANCE
4
14
13
5
5
4
4
6
6
7
7
1
2
2
3
3
11
11
12
14
15
15
13
10
10
9
9
8
8
Lips of seal
(3) must face
inward.
LIFT CYLINDER