HydraMaster CTS 403 Flex, Owner'S Manual

Page: 37 / 140

Machine Maintenance: 4-4
HIGH PRESSURE PUMP MAINTENANCE
Daily
Check the oil level and the condition of the oil. The oil level should be up to the center
of the sight glass on the rear of the pump or between the “MIN” and “MAX” lines on the
dipstick. The dipstick may be found by removing the oil cap.
Periodically
Change the oil after the initial 50 hours of operation and every 500 hours after that. It may
be necessary to replace the pump seals and check valves at 500 hours if the truckmount
has been running in high ambient temperatures.
If the oil becomes discolored or contaminated one of the oil seals may be damaged.
Do not operate the pump if the crankcase oil has become contaminated. Do not
rotate the drive shaft without oil in the crankcase reservoir.
The pump should never be run dry. Running the pump dry will cause premature
wear on the seals, packing and plungers. Running the pump dry for a prolonged
period of time may cause damage that cannot be repaired and voids warranty.
Do not run the pump with frozen water in the manifold. If there is a risk of freezing,
freeze guard the truckmount. See section 3 for freeze guarding information.
Service
The next few pages explain how to disassemble and inspect all user serviceable parts of
the pump.
Do not disassemble the pump unless you are a skilled mechanic. For assistance,
contact your distributor.