Bosch Rexroth CS 440RC - Hydraulic System Troubleshooting; Conveyor Not Starting or Running; Spinner Not Starting or Running; Dump Body Not Raising When Loaded

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Bosch Rexroth Canada ı 03.10.2011 ı Revision 5.4
17.2 Hydraulic
1.
1.1.
1. Conveyor
ConveyorConveyor
Conveyor does not start or will not run
does not start or will not rundoes not start or will not run
does not start or will not run
• Check override on coil; either push in or screw in override dependent on valve
type
• If MP18 valve turn in manual stroke limiter
• Check pump for flow and pressure
• Check if the conveyor is jammed
• If neither of these works remove spool from valve and check for scoring
2.
2.2.
2. Spinner
SpinnerSpinner
Spinner does not start or will not ru
does not start or will not rudoes not start or will not ru
does not start or will not run
nn
n
• Check override on coil; either push in or screw in override dependent on valve
type
• If MP18 valve turn in manual stroke limiter
• Check pump for flow and pressure
• Check if the conveyor is jammed
• If neither of these works remove spool from valve and check for scoring
3.
3.3.
3. Dump
Dump Dump
Dump body will not raise when loaded
body will not raise when loadedbody will not raise when loaded
body will not raise when loaded
• Check pump flow and pressure
• Check port relief if installed
• Push override on coil or stroke limiter
4.
4.4.
4. Slow hydraulic function
Slow hydraulic functionSlow hydraulic function
Slow hydraulic function
• Check pump flow and pressure
• Check return line filter for clogging
• Check Load sense line for correct pressure setting
• Check line sizes for appropriate flow
5.
5.5.
5. Hydraulic functions will not shut off
Hydraulic functions will not shut offHydraulic functions will not shut off
Hydraulic functions will not shut off
• Check drain line from MP18 valve
• Check spools in sections for scoring
• Check for correct plumbing
6.
6.6.
6. Hydraulic system is heating up
Hydraulic system is heating upHydraulic system is heating up
Hydraulic system is heating up
• Check pressure setting
• Check return filter
• Check pressure filter
7.
7.7.
7. Hydraulic oil is milky or foaming
Hydraulic oil is milky or foamingHydraulic oil is milky or foaming
Hydraulic oil is milky or foaming
• Air in hydraulic oil
• Check connections