SM 1956 4-00
3
Section 230-0130
Body System - Body Cylinder
6. Ensure cushion sleeve (18) and circlip (19) are
secure in piston (12).
7. Insert new piston seal (13) and new wear rings (14)
in piston (12).
8. Fully grease piston (12) OD and 'O' rings (8 & 9) in
end cap (3).
9. Sling assembled piston rod (2) in a manner to allow
careful leading of the assembled piston rod into
cylinder body (1). Take care not to damage piston seal
(13) on cylinder body (1) threads.
10. After piston (12) is inserted in cylinder body (1), push
the piston rod assembly into cylinder body (1) maintaining
coincidental centre lines of piston rod and cylinder body.
11. Before piston rod (2) is fully home and, with slings
still taking some of piston rod (2) weight, engage end
cap (3) thread and screw home.
12. Push piston rod (2) to the fully retracted position and
tighten end cap (3) to a torque of 237 Nm (175 lbf ft).
13. Re-drill end cap (3) for lock ring (10), 3 x 12 mm
(0.125 x 0.50 in) deep, if necessary. Insert lock ring
(10) in end cap (3).
INSTALLATION
Numbers in parentheses refer to Fig. 1.
Note: Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 230-0000, BODY
SYSTEM SCHEMATIC. Renew all 'O' rings where used.
WARNING
To prevent personal injury and property
damage, be sure lifting equipment is properly
secured and of adequate capacity to do the job
safely.
1. Install a suitable strap around the cylinder and
position cylinder on unit with base end of cylinder ready
for mounting.
2. Install spacers (25) in base end of cylinder and
insert lower pin (23) through mounting bores, spacers
(25) and cylinder. Secure lower pin (23) with washer
(28), lockwasher (27) and bolt (26). Tighten bolt (26) to
a torque of 66 Nm (49 lbf ft).
INSPECTION
Numbers in parentheses refer to Fig. 1
1. Clean all parts of the cylinder with a suitable solvent
and dry with clean, lint-free cloths. Clean all grooves
carefully to remove any foreign material.
2. Check cylinder body (1) and outer diameter of piston
(12) for scratches, cracks or other defects. Remove
ridges, nicks and scratches with a fine stone and re-
clean. Replace any components which cannot be
repaired.
3. Inspect piston rod (2) for distortion, cracks or other
defects. Replace piston rod if defective area is
irreparable.
4. Check spherical bearing (20) for wear and replace if
necessary.
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
WARNING
To prevent personal injury and property
damage, be sure lifting equipment is properly
secured and of adequate capacity to do the job
safely.
1. Press spherical bearing (20) in base end of cylinder
body (1) and piston rod (2) end. Secure spherical
bearings (20) with circlips (21).
2. Install new cushion sleeve (4), circlip (5), rod seals (6),
nylon ring (22), 'O' rings (8 & 9) and back up (17) in end cap
(3). Load end cap (3) over piston rod (2) thread, taking care
not to damage rod seal (6) on the thread.
3. Install new 'O' rings (16) on piston rod (2) and
replace cushion spear (11).
4. Apply Loctite 243 to first two threads of piston (12).
Using special tool which can be fabricated as shown in
Fig. 3, screw on piston (12) and tighten to a torque of
1 356 Nm (1 000 lbf ft).
5. Insert piston grub screw (15) through wear ring (14)
groove in piston (12) and into groove machined in
piston rod (2). Tighten grub screw (15) to a torque of 49
Nm (36 lbf ft). Ensure the extreme of grub screw (15) is
below the level of wear ring (14) groove.
Courtesy of Machine.Market
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