Operation; Operating Principles - NRC 30CS Operation And Maintenance Manual

3

OPERATION

This chapter describes how to operate the wrecker. Operating a wrecker involves using many
functions and components simultaneously. To take advantage of all the capabilities of your
wrecker, you must first understand the general operating principles.
3.1

Operating principles

Risk of tipping and damaging the wrecker. A CS wrecker is a powerful machine.
Always think about what you are about to do before operating the equipment and
make sure to apply general vehicle equilibrium and stability principles as described
in this section. For lifting capacities, see 1.2.7 Lifting capacity. Lifting a load that
exceeds the specified lifting capacities can tip or damage the wrecker.
The general principles to understand before operating the wrecker are as follows:
1. The more you extend the boom, the less weight you will be able to lift with it.
2. When winching, the higher you raise the boom, the longer the lever is and the sooner the
truck will tip backward. However, lifting the boom will provide more grip on the ground as
it will put more pressure on the jack legs. You can use a different boom angle when
pulling, depending on the load weight and position.
3. Any weight applied to the tow truck behind the rear axle will bear directly on this rear axle.
The rear axle also bears some weight transferred from the front axle. Therefore, for a
given load on the underlift, the pressure exerted on the ground by the rear axle will be
greater than that the pressure from the load alone.
4. The more the underlift is extended so that the load is further away from the truck, the
greater will be the load transfer from the front to rear.
5. The more winch cable you unwind, the more pulling force you have to tow the vehicle.
6. You can use pulleys to increase the winch capacity.
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
61
REV. 1
APRIL 12, 2023