PLATE AS 2947176 - Caterpillar

Introduction
This procedure is used to measure the operating values of the proportioning solenoids for the hoist control valve.Specifications
Table 1
Dump Body Machines
Hoist Control Valve Solenoid (1) Solenoid (2)
HOLD 0 amp 0 amp
RAISE 0 amp 1.9 amp
LOWER 1.9 amp 0 amp
FLOAT 1.55 amp 0 amp
SNUB 0.775 amp 0 amp
Table 2
Ejector Body Machines
Hoist Control Valve Solenoid (1) Solenoid (2)
EJECT 1.9 0
HOLD 0 0
RETRACT 0 1.9 Required Tools
Table 3
Required Tools
Tool Qty Part No Description
C 2 212-2160 Digital Multimeter Gp Test Preparation
Illustration 1 g03025076
Install the steering frame lock. Refer to Operation and Maintenance Manual, "Steering Frame Lock" for the machine being serviced. Test Procedure for Dump Body Machines
Illustration 2 g03036599
Hoist control valve
(1) Hoist proportioning solenoid for SNUB, FLOAT, and LOWER
(2) Hoist proportioning solenoid for RAISE
Install Tooling (C) in series with hoist proportioning solenoid (1).
Install Tooling (C) in series with hoist proportioning solenoid (2).
Move the hoist control lever to the HOLD position and start the engine. Record the readings on both multimeters.
Move the hoist control lever to the RAISE position and start the engine. Record the readings on both multimeters. Raise the dump body to the dump position.
Move the hoist control lever to the LOWER position and start the engine. Record the readings on both multimeters.
As the dump body is lowering, release the hoist control lever. Record the readings on both multimeters. The recorded values are for the FLOAT position.
When the dump body contacts the frame, record the readings on both multimeters. The recorded values are for the SNUB position.
Disconnect Tooling (C).
Compare the recorded values with the values in Table 1. Problem: The values do not match the table.
Probable Cause
The hoist control position sensor is not sending the correct signal to the Power Train/Chassis Electronic Control Module (Power Train/Chassis ECM). Use the Caterpillar