Usage:
Challenger 65 and 75 Tractors
- SUPPLEMENT: 02/28/94
Service Magazine; January 31, 1994; Page 2; "High Torque Steering Motor Available" for Challenger 65 and 75, A-Series and B-Series Agricultural Tractors.
On page 2, Illustration 1 incorrectly reflects a C-Series machine, however the concept is the same for A-Series and B-Series machines. On page 3, the required parts chart, and the top view shown in Illustration 2 are correct.
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A higher torque steering motor is now available to improve steering performance in high load applications. With the standard torque motor, high load applications would cause the motor to work at or near its torque capacity. This new high torque motor is now available as a factory attachment and can also be retrofit on all Challenger A-Series and B-Series machines.
To retrofit the high torque motor on A-Series and B-Series machines, follow the procedures in the steps listed below.
Procedure To Install High Torque Steering Motor
NOTE: The installation procedures for the high torque steering motor are covered in the following steps.
Illustration 1. Side view and top view of high torque steering motor installation.
NOTE: Do not discard any parts that are removed, until all assembly procedures are complete. Some of the removed parts will be used later in this procedure.
Illustration 2. Top view.
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Hot oil and components can cause personal injury. Do not allow hot oil or components to touch the skin. Be sure that the steering motor and oil are cool enough to touch with your bare hand prior to performing any service work.
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1. Disconnect the left and right steering hose assemblies and the drain line from the steering motor. Remove the old steering motor from the machine. See the appropriate service manual module for your machine for the correct procedure to remove the steering motor.
2. Install a new seal (5) on motor (9).
3. Install the new motor on the differential cover using the old bolts and washers.
4. Loosen the hose retaining clamps on the left steering hose assembly and remove the small floor plate just inside of the operator's compartment.
5. Disconnect the left steering hose assembly from the steering pump at point (A). See Illustration 1 for the location of point (A). Install new seals (1) and (2) onto the left steering hose assembly and reattach to the steering pump at point (A) using the old bolts, washers, and flanges. Tighten the bolts finger tight. Do not tighten completely at this time.
6. Starting with hose assembly (12) and ending with the motor (9), assemble seal (1), spacer (11), seal (2), spacer (8), and one additional seal (2). Secure hose assembly (12) to motor (9) using the old washers removed in step 1 and four new bolts (7). It may be necessary to pull hose (12) toward the outside of the machine at the pump to take up some of the slack.
NOTE: Be sure to orient spacer (8) with the open port pointing up.
7. Using a new seal (4), install the nipple assembly and cap from the old motor into new spacer (8).
8. Disconnect the right steering line hose assembly from the steering pump at point (B). Disconnect all clamps holding the right steering line hose assembly and remove from the machine.
9. Replace the old right side steering hose assembly with hose assembly (10).
10. At point (B) where the old steering hose assembly was disconnected from the steering pump, connect hose assembly (10) using new seals (1) and (2). Secure hose assembly (10) to the steering pump using the same bolts, washers and flanges removed in Step 8.
11. Starting at the motor end of hose assembly (10), assemble one seal (1), spacer (8), and one seal (2). Secure the spacer, seals, and hose assembly to motor (9) using the old bolts, washers, and flanges.
NOTE: Be sure to orient spacer (8) with the open port pointing up.
12. Using a new seal (4), install the old nipple assembly and cap into the port in spacer (9).
13. Remove the 6V-8638 Connector from the old motor and install on the new motor (9) at the rear drain port (C) using a new seal (3).
NOTE: It may be necessary to move the plug from the rear drain port to the front drain port depending on the shipping configuration of the steering motor.
14. Connect the drain line that was disconnected in Step 1 to the 6V-8638 Connector and the steering motor (9) using two new seals (6).
15. Check to make sure that all clamps and lines are securely attached and not interfering or rubbing.
16. Install the floor plate that was removed in Step 4.