HEAD 1627487 - Caterpillar

The spring of the recoil spring assembly is compressed under several tons of force.Do not attempt to compress or release the tension of the spring with the nut on the end of the retaining rod.Damaged threads on the retaining rod or nut can cause the assembly to come apart with force, resulting in injury or death.
Note: Prior to assembling the recoil spring assembly, make sure that Tooling (A) is on a level surface.
Illustration 1 g00859172
Check the condition of the threads on recoil spring retaining rod (13) and nut (6) . If the threads are worn or damaged, use new parts for replacement.
Check the inside of support assembly (11) . Make sure that the support assembly is clean and free of dirt.
Assemble the recoil spring assembly loosely. Install spring (10) in support assembly (11) . Install recoil spring retaining rod (13) and support (9) .
Illustration 2 g00859362
Note: The use of a pry bar might be necessary to line up support (9) with support assembly (11) . Place the pry bar between the recoil spring assembly and movable plate (3) of Tooling (A) to line up the support with the support assembly.
Illustration 3 g00858995
The weight of the recoil spring assembly is approximately 590 kg (1300 lb). Use a suitable lifting device in order to position the recoil spring assembly on adjustable supports (1) in Tooling (A) . Adjust the adjustable supports in order to align the centerline of the recoil spring assembly with the centerline of Tooling (A) .
Illustration 4 g00859150
Illustration 5 g00859153
Note: The suitable lifting device has been removed from the recoil spring assembly in order to provide a better illustration of level gauge (4) .
Put a level gauge (4) on the recoil spring assembly. Reposition the recoil spring assembly until the recoil spring assembly is level. Reposition the recoil spring assembly until the retaining rod and nut (6) are centered in the hole in reaction plate (2) . The recoil spring assembly is leveled by moving adjustable supports (1) higher or lower. After the recoil spring assembly is leveled and centered, install two pins (5) on the back side of reaction plate (2) , as shown.
Illustration 6 g00858923
Install Tooling (C) on Tooling (B) .
Operate Tooling (B) in order to hold the recoil spring assembly in position between reaction plate (2) and movable plate (3) . Make sure that the recoil spring assembly is level and centered in Tooling (A) .
Illustration 7 g00859769
Illustration 8 g00859159
Close covers (7) on Tooling (A) . Compress the recoil spring assembly with Tooling (B) . Open the covers on Tooling (A) , and measure the assembled length of the recoil spring assembly. Measure the distance from the end of the support assembly to the mark on support (9) , as shown. Dimension (X) is the assembled length of the recoil spring assembly. The assembled length must be 1194.0 1.0 mm (47.0 0.04 inch). If the assembled length is not correct, close covers (7) on Tooling (A) , and use Tooling (B) to adjust the spring length. If the assembled length