Terex TS14G, Maintenance Manual

Page: 197 / 376

Section 220-0120
SM 1897 1-00
3
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 tube (1) bore, outer diameter of
piston (3) and piston grooves for scratches, cracks
or other signs of damage. Remove ridges, nicks and
scratches with a fine stone and re-clean. Replace
any components which cannot be repaired.
3. Inspect piston rod (20) for distortion, cracks or
other defects. Replace piston rod (20) if defective
area is irreparable.
4. Check bushings (5) for wear and replace if
necessary.
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
Note:
Tighten all fasteners to standard torques listed
in Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
Note:
To facilitate assembly, lubricate all internal
sliding or wearing surfaces prior to assembly with the
same hydraulic oil that is used in the system.
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. If necessary, press new bushing (5) into eye end
of piston rod (20).
2. Install new rod seal (16) in bore of end cap (2) with
the lip pointing towards the internal face of the end
cap (2). Install new nylon ring (18) behind rod seal
(16) in groove.
3. Install new wiper (17) and new wear rings (21) into
bore of end cap (2).
4. Install new backup ring (15) and new 'O' ring (14)
on outer groove on end cap (2).
Steering System - Steering Cylinder
5. Guide end cap (2) assembly onto piston rod (20).
6. Install piston seal (13) and wear ring (12) into
piston (3) external grooves. Install 'O' ring (19) into
internal groove of piston (3).
7. Install piston (3) on piston rod (20) and tighten to a
torque of 1 355 Nm (1 000 lbf ft).
8. Install new locking screw (4) into piston (10) and
tighten to a torque of 48 Nm (36 lbf ft).
9. Ensure bore of cylinder tube (14) is well lubricated
with hydraulic oil. Carefully insert piston rod (20),
piston (3) and end cap (2) assembly into the cylinder
tube (1), making certain that piston seal (13) is
compressed correctly, and backup ring (15) and 'O'
ring (14) are in place on the end cap (2).
10. Align end cap (2) and cylinder tube (1) as marked
during Disassembly. Install bolts (10) and washers
(11) and secure end cap (2) to cylinder body (1).
Tighten bolts (10) to a torque of 260 - 280 Nm
(190 - 210 lbf ft). Use feeler gauge to check the gap
variation between the cap and cylinder which must
not exceed 0.38 mm (0.015 inch) when measured at
four equally spaced points on the circumference.
INSTALLATION
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners to standard torques listed
in Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
Note: Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 220-0000,
STEERING 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, or other lifting device, around
one cylinder assembly and position cylinder assembly
on the vehicle, with base end of cylinder ready for
mounting.
Courtesy of Machine.Market