Usage:
Challenger 35 (8DN, 8RD, ADK),
Challenger 45 (1DR, ABF, 3BK),
Challenger 55 (7DM, 6NN, AEN),
Challenger 65 (7YC1-1899),
Challenger 65B (7YC1900-Up),
Challenger 65C (2ZJ1-1964),
Challenger 65D (2ZJ1965-Up),
Challenger 65E (6GS),
Challenger 70C (2YL),
Challenger 75 (4CJ),
Challenger 75C (4KK),
Challenger 75D (5AR),
Challenger 75E (6HS),
Challenger 85C (9TK),
Challenger 85D (4GR),
Challenger 85E (6JS),
Challenger 95E (6KS) Agricultural Tractors;
VFS50 (8XK),
VFS70 (7XN) Versatile Flotation System
Reference: Special Instruction, REHS0151, "Procedure For Reinforcing and Bolting On Guide Blocks".
Description of Change: Individual guide blocks are now available through parts service for use in replacing damaged or missing guide blocks. The guide blocks contain pre-drilled holes for the bolts that are used during installation. For correct installation, make sure that you obtain and follow the instructions outlined in the reference special instruction.
Adaptable To: Two different terms should be defined for the purpose of discussion. "Bolt on" guide blocks refer to unbonded guide blocks which are attached to the belt by 2 bolts. "Reinforced" guide blocks refer to installation of bolts in existing "bonded" guide blocks to give additional bending strength.
"Reinforced" guide blocks may be used in all applications. Significant guide block life improvement has been demonstrated in sideslope applications when using "reinforced" guide blocks. "Reinforced" guide blocks also help minimize the likelihood of belt untracking in construction applications.
"Bolt on" guide blocks are recommended in non-side slope applications as a way to extend the life of belts which have lost significant amounts of guide blocks or have damaged or worn guide blocks to the extent that it causes belt misalignment. As a result, belts with significant grouser life remaining can be reused by this method.
"Bolt on" guide blocks have been tested and used in sideslope applications. They are recommended to replace occasional lost guides in this type of application. Replacement of all guide blocks with "bolt on" guide blocks in sideslope applications may or may not prove to be economically viable, depending on individual circumstances. For best results in sideslope applications, use "reinforced" guide blocks.
When installing "bolt on" guide blocks on belts with worn guide blocks, the "bolt on" guide blocks must be trimmed to approximately the same width of the existing worn guide blocks. Refer to reference special instruction for the complete details. The "bolt on" guide blocks are retrofittable to belts as listed in the table below.
