Manitowoc Published 05-16-17, Control # 233-03 10-55
999 SERVICE/MAINTENANCE MANUAL TROUBLESHOOTING
Test 23 – Servicing the Motor Loop Flushing (Purge) Valves
Problems with a faulty loop-flushing valve are best corrected
by replacing the complete valve assembly. To service the
loop flushing valve:
• Engine must be off and power off, with all brakes and
locks engaged.
• Drain motor by removing attached hydraulic lines.
• After draining, replace hydraulic hose.
• Remove hoses from flushing valve and replace valve.
• The hydraulic fluid flow through the valve is adjusted with
valve flow control on top of valve (set for 6 gpm).
• The hydraulic sequence valve is adjusted with flow
control on side of valve (set for 200 psi [14 bar]).
Item Description
1 Motor
2 Loop Flushing (purge) Valve
3 Valve Flow Control
4 Sequence Valve
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