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Section 220-0130
SM 1747 2-99
3
Steering System - Double Relief Valve
DISASSEMBLY
Numbers in parentheses refer to Fig. 1.
1. If required, remove elbows from double relief valve
and identify to aid in assembly.
2. Carefully remove cartridge assemblies (2) from
valve body (1). Remove and discard 'O' rings (3 & 4).
WARNING
Do NOT disassemble valve cartridges; they are
pressure set and sealed at assembly. If
cartridge is defective, it must be replaced with
a new cartridge.
3. Carefully remove poppet plugs (5) from valve body
(1). Remove 'O' rings (8), springs (6) and poppets (7)
from valve body (1). Discard 'O' rings (8).
Note:
To remove spring (6) and poppet (7) from valve
body (1), it is necessary to turn valve body on its end
and tap down on a work bench, or other suitable area,
to release the parts.
4. If necessary, remove plugs (10) from valve body (1).
INSPECTION
Numbers in parentheses refer to Fig. 1.
Note:
There is a seal kit available to replace all of the
seals in the valve. Refer to the Parts Book for part
number of the seal kit.
1. Clean all parts with a suitable solvent and dry with
compressed air.
2. Inspect all threaded parts for stripped or damaged
threads.
3. Inspect valve body (1) bores and poppets (7) for
excessive wear, scratches or deep grooves. If either
valve body (1) or poppets (7) are damaged beyond
repair, the complete valve assembly must be replaced.
4. Inspect springs (6) for breaks, lack of tension or
other damage. Replace if required.
5. Check condition of valve cartridges (2). Insert a
blunt nose drift or punch in cartridge end and depress
piston.
Note:
If piston does not move freely or hangs up,
replace cartridge. Cartridge should also be replaced if
lead seal has been removed and cartridge adjustment
has been tampered with.
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
1. If removed, install plugs (10) in valve body (1).
2. Install springs (6) in end of poppet plugs (5) and
insert in poppets (7). Install new 'O' rings (8) on poppet
plugs (5) and install plug assemblies in valve body (1).
3. Install new 'O' rings (3 & 4) on valve cartridges (2).
Lubricate threaded end of cartridge (2) and install in
valve body (1).
4. If removed, install elbows on double relief valve as
tagged at disassembly.
INSTALLATION
Numbers in parentheses refer to Fig. 2.
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.
1. Make certain, area of installation is clean. Position
new 'O' rings (3) and double relief valve (2) onto flow
reversing valve (5), as per index marks and secure in
place with bolts and lockwashers (1). Tighten bolts (1)
to a torque of 80 Nm (58 lbf ft), lubricated.
Note:
If a new double relief valve (2) is being installed,
be sure to line up the ports in the bottom face of the
double relief valve (2) housing with the ports of the
flow reversing valve (5).
Содержание TS14G
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