OPERATION & MAINTENANCE MANUAL SWE155F
3.4.7 Machine Preheating in Cold Weather
Note
When hydraulic oil temperature is below
25 ℃ , operating machine in this
circumstances can cause sudden
movement and stop, the machine will
become hard to maneuver. And accidents
may occur.
When the engine is difficult to be started,
it's necessary to carry out warm up
operation.
With engine started, cancel auto-idle, adjust
throttle knob to low speed position (approx.
1200r/min) to allow the engine to idle for 5
seconds.
Adjust throttle knob to set engine revs to 1500
rpm, operate bucket to perform “dig” —
“dump” blank action for 5 minutes without
attempting any other actions.
Engage engine speed at 1500 rpm, operate
bucket and arm to act to full stroke for 5
minutes.
Adjust throttle knob to speed up engine rev to
high speed position (approx. 2000r/min), cycle
the following operations for 3-5 times.：
Boom up←→down movement
Arm retract ←→extend
bucket dig←→dump
platform left swing←→right swing
complete machine travel forward←→travel
backward
With warm-up operation done, check gas
discharging, noise and all other actions. If the
machine is functioning properly, proceed to
work. If not, keep carrying out step 4 until it’s
functioning properly.
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