Usage:
Challenger 35 (8DN, 8RD, ADK),
Challenger 45 (1DR, ABF, 3BK),
Challenger 55 (7DM, 6NN, AEN) Agricultural Tractors
Description of Change: An improved power train guard is now available for the right side of Challenger Rowcrop Tractors. The improved guard provides the following benefits:
-
- * The transmission control/solenoid wiring is protected from crop debris
- * The transmission speed sensor is better protected from crop debris
- * The transmission control/solenoid wiring is protected from crop debris
Adaptable To: The improved power train guard was effective with first production of the 1999 model year Rowcrop Agricultural Tractors (8RD, ADK, ABF, 3BK, 6NN, AEN). The power train guards are retrofittable to earlier Rowcrop Agricultural Tractors (8DN, 1DR, 7DM). The required parts are listed in Table 1. Some rework is required, depending on your particular machine. See the installation procedure in this article for more details.
Illustration 1.
Retrofit Guard Group
Installation Procedure
NOTE: This installation may be done without removal of the right hand side roller frame. However, guard removal and installation is much easier to perform if the roller frame is first removed.
1. Remove existing right hand rear guard assembly and existing right hand front guard assembly. Keep right hand rear guard assembly if it will be reworked and reused.
2. Remove the two bolts that are shown in Illustration 2. Bolt (B) will be replaced and bolt (A) will be reused.
Illustration 2.
Hardbar
3. For Challenger 35 (8DN1-595), Challenger 45 (1DR1-1316), and Challenger 55 (7DM1-514) Agricultural Tractors, the 165-2069 Bracket As may need to be reworked as shown in Illustration 3 in order to allow clearance with the track tensioner pressure sensor wire.
NOTE: If 165-2069 Bracket As already has the cutout (E), then go to Step 4.
In addition, the U-shaped track tensioner harness guard may need to be modified in order to provide correct clearance with the 165-2069 Bracket and 172-8584 Guard-Lower (right hand). Then reinstall reworked tension harness guard. Leave the guard loose for the time being.
Illustration 3.
Modification to 165-2069 Bracket As.
4. Install 165-2069 Bracket As (7) by using existing Bolt (A) and new 8T-0674 Bolt (B). Tighten the bolts to a torque of 800 ± 100 N·m (590 ± 75 lb ft).
Illustration 4.
Location of additional holes in right hand frame rail.
5. Locate and drill two holes as shown in Illustration 4. Note that these holes are first drilled, then tapped into the frame rail.
NOTE: Another method to locate the holes could be to wait until Step 7, then bolt up the guard in the other locations, then use it as a template in order to locate these holes.
6. For Challenger 35 (8DN1-595), Challenger 45 (1DR1-1316), and Challenger 55 (7DM1-514) Agricultural Tractors, the 172-8584 Guard-Lower (right hand) may need to be modified as shown in Illustration 5 in order to provide clearance with the track tensioner harness guard.
NOTE: If 172-8584 Guard-Lower already has this cutout, then skip to Step 7.
If clearance is not sufficient, modify either the 172-8584 Guard, or the existing tensioner harness guard.
Illustration 5.
Modification needed to 172-8584 Guard
7. Install 172-8584 Guard-Lower (right hand) by using two 8T-4908 Bolts (11) and two 8C-0572 Washers (10) at the frame rail. Install three 8T-4189 Bolts (10) and two 8C-0572 Washers (2) into 165-2069 Bracket As.
Illustration 6.
8. Install 154-9989 Spring Clip (3) onto 157-2739 Guard As-Front. Install the clip at location (F) shown in Illustration 6.
9. Install 157-6127 Cover As-Front (right hand) to 157-2739 Guard As-Front by using two 8T-4189 Bolts (10) and two 8C-0572 Washers (2). Then install 1L-6366 Plug (1) into 157-2739 Guard As.
10. Install 101-2854 Seal along top edge of 172-8584 Guard-Lower (right hand). This is to reduce the chance of rattling and to protect contact with a sharp edge.
11. Install combined guard assembly from Step 9 onto machine by using three 8T-4189 Bolts (10) and three 8C-0572 Washers (2). Do not install bolts in the rear three holes yet.
Illustration 7.
Modification to existing rear guard assembly (right hand)
Illustration 8.
12. If the existing rear guard assembly (right hand) is reworked, it must be reworked for all machines as shown in Illustration 7 and 8.
13. Install modified rear guard assembly (right hand) or new 157-6151 Guard As onto machine by using nine 8T-4189 Bolts (10), nine 8C-0572 Washers (2), three 5C-7261 Nuts (9), and three 8C-0572 Washers (2).
Illustration 9.
Final Guard Installation (Roller frame removed for clarity)
The completed Installation is shown in Illustration 9.