Hydraulic Failure; Pump Failure; Truck Failure; Underlift Stinger Failure - NRC 30CS Operation And Maintenance Manual

6.2

Hydraulic failure

In the event of a hydraulic failure, the hydraulic pressures required for normal operation are not
reached in the circuits. The hydraulic pump or PTO may be the cause.
The hydraulic failure must be repaired before performing other towing operations.
To troubleshoot a hydraulic failure:
1. Using a component that requires hydraulic pressure (e.g. the boom), check whether the
hydraulic pressure shows as normal on the console.
2. Engage the PTO to operate the hydraulic pump and check the console to see whether the
PTO engages normally. If the PTO does not engage, have it repaired.
3. If the PTO works normally, check whether the hydraulic pump is operating normally. If the
hydraulic pump is not working normally, see Pump Failure below.
When the correct operating pressures are reached, stabilize the equipment safely.
6.3

Pump failure

In the event of a pump failure, the entire hydraulic system will not be functional. If all hydraulic
components (boom, jack legs, etc.) are in their stored position, i.e. the position for travel without
a load, bring your equipment to a repair location. If some components are not in their stored
position, and it is not possible to safely get to a repair point, the pump must be repaired or
replaced on site.
6.4

Truck failure

In the event of a vehicle breakdown, you will not be able to operate the equipment. Have the
equipment moved to a safe place to make the necessary repairs on the truck.
6.5

Underlift stinger failure

In the event of an underlift stinger failure in which the stinger can no longer be extended or
retracted, the most probable cause is a bent cylinder. Remove the underlift and have it repaired.
Composite Slider Wreckers – Operation and Maintenance
Models: 30CS-40CS-50CS
O p e r a t i o n a n d M a i n t e n a n c e
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REV. 1
APRIL 12, 2023