6921413
36
SERVICE
CCW
CW
RR1486.eps
RR1487.eps
RR1488.eps
ccw
cw
RR0524.eps
4.7
Drive Control Valve
4.7-1
Drive Control Valve Service
1
Rotator Drive
Control Valve
3
4
Plug
Fittings
WARNING
: Before removing any hoses,
relieve pressure in the hydraulic system.
With the truck off, open the truck auxiliary
control valve(s) several times in both
directions.
1
Disconnect the hydraulic hoses and tubes (if equipped)
to the drive control valve. Tag hoses and tubes for
reassembly.
2
Remove the capscrews fastening the valve to the
baseplate (14J) or drive group (18J). For 18J
attachments, keep track of the two O-rings between
the valve and drive motor. For reassembly, tighten the
capscrews to the following torque value:
14J –
70 in.-lbs. (8 Nm)
18J –
16 ft.-lbs. (22 Nm)
3
Remove cartridges and fittings from the valve.
4
Remove the O-rings and back-up rings from the
cartridges.
5
Clean all parts with clean solvent. Remove any burrs or
sharp edges with emery cloth.
6
For reassembly, reverse the above procedures except
as follows:
• Install new O-rings and back-up rings on the
cartridges, as shown.
• Lubricate the cartridges and seals with petroleum
jelly prior to reassembly.
2
Rotator Drive
Control Valve
O-Rings
Tubes
Valve
Hoses
4
Body
Counterbalance
Cartridges
Counterbalance
Cartridges
Back-up Rings
O-Rings
Counterbalance
Cartridge
GA0486.eps
1
14J Attachments
14J Attachments
18J Attachments
18J Attachments
Valve
Содержание 14J Series
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