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PAGE 62 — MAYCO LS400/LS500 PUMP — OPERATION AND PARTS MANUAL — REV. #6 (09/19/11)
The hydraulic troubleshooting procedures listed below are intended for use by individuals equipped with the proper tools and
equipment and are familiar with hydraulic systems and safe shop practices. Use the Pump Troubleshooting Table (Table 8) to
identify possible causes for the pump’s malfunction. Contact the Multiquip Service department for the proper repair procedure.
LS400/LS500 PUMP — TROUBLESHOOTING (PUMP)
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DO NOT open hydraulic lines or loosen hydraulic fittings
while the engine is running! Hydraulic fluid under pressure
can penetrate the skin, blind, cause burns or create other
potentially dangerous hazards.
WARNING - HYDRAULIC SYSTEM HAZARD
During routine maintenance or removing material
blockage, you will be required to put your hand in the
concrete cylinders or near the shuttle tube. You are at
EXTREME RISK
of injury or
AMPUTATION
if the
engine is running or if pressure is in the hydraulic
system.
Prior to performing any maintenance on the pump,
follow described lock out-tag out procedures. Stop the
engine by turning off the ignition switch and remove
the starter key. Place a “DO NOT OPERATE” tag
over the switch and disconnect the battery. The
pressure reading on the
accumulator pressure
gauge
MUST
read
ZERO. ALWAYS make
sure the accumulator
circuit pressure reads
zero prior to performing any maintenance on the pump.
DANGER - AMPUTATION RISK