5 Installing theMain Harness Assembly
5.1 Introduction
The system cabling provides power to, and connects, the system hardware.
Note – The cabling diagrams in this chapter are not to scale.
5.2 Cable routing guidelines
Before you permanently fix the harness cables, you must confirm that the cable
connectors can reach the connectors on the system components. To do this:
1. Identify where you are going to mount the components.
2. Either:
use string to route along the anticipated installation paths, and then
measure the string against the cables, OR
drape the harness cables over the machine and loosely cable tie them in
place.
ATTENTION — Do not use a tool, such as pliers, to tighten a harness or component
connector as this could damage the connector. Always hand-tighten the connectors.
When you route the harness cables:
l
l Take extreme care to protect the main cable harness and all cables during
routing. Every attempt must be made to attach the Trimble harness to non-
vibrating machine structures (for example, the frame). Never attach the
harness to the engine or engine mounted components. Trimble cables and
harnesses must never be attached to OEM wiring when routing from the
machine's frame to the isolated cab structure. Extra cable should be bundled
and secured out of the way to prevent damage.
Make sure that:
the cables do not interfere with, or catch on, any mechanical linkages
you maintain access to any service maintenance panels
the cables are long enough to reach all of the system components
l Protect the cables where they pass over or through any sharp metal edges.
l To prevent the cables from moving and chafing, secure them with cable ties
and silicone.
l To reduce stress on the connectors, secure the cables to something solid near
the connector.
l Do not tie the cables to machine parts that get hot.
34 GCS900 Grade Control System for Excavators Installation Manual
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