Towing; Trolley Operating Instructions; After The Engine Has Started - Komatsu 730E Operation & Maintenance Manual

OM3070
Operating Instructions

TOWING

Prior to towing a truck, many factors must be care-
fully considered. Serious personal injury and/or sig-
nificant property damage may result if important
safety practices, procedures, and preparation for
moving heavy equipment are not observed.
NOTE: If the disabled truck is loaded, dump the
entire load. Never pull or tow a loaded truck.
DO NOT tow the truck any faster than 8 kph (5 mph).
A disabled machine may be towed after adhering to
the following minimum precautions.
1. Shut the engine off. Chock wheels on disabled
truck to prevent movement while attaching tow
bar.
2. If the truck is equipped, install the hydraulic
connections for steering and braking between
the towing and towed vehicles. Check the
towed vehicle braking system.
3. Determine that the towing vehicle has adequate
capacity to both move and stop the towed truck
in all conditions.
4. Inspect the tow bar. The tow bar capacity must
be approximately 1.5 times the gross vehicle
weight of the truck being towed.
5. Block the disabled truck to prevent movement
while attaching the tow bar.
6. Release the disabled truck brakes and remove
the wheel chocks.
7. Sudden movement may cause tow bar failure.
Smooth and gradual truck movement is preferred.
TROLLEY OPERATING
INSTRUCTIONS
The instructions provided here are specifically for
trolley use. General operating instructions outlined
earlier in this chapter apply.

AFTER THE ENGINE HAS STARTED

When performing the following tests, the truck
must be parked and the engine on. Place the
master control lever in the DIESEL position.
Perform this test before operating the truck.
1. Depress the leakage current test switch (on
instrument panel to right of steering column)
and hold in the ON position for 4 seconds.
a. f the system is operating correctly, the trolley
fault indicator lamp will turn on.
b. If the trolley fault indicator does not light,
notify maintenance personnel. The truck can
still be operated in the DIESEL position.
2. To reset after the trolley fault indicator lamp
turns on, move the master control switch to the
TROLLEY position for a minimum of 1 second.
Then, move the switch back to the DIESEL
position.
Operation - Section 30
Page 30-17