1999/07/26 Caterpillar

Improved Hydraulic Coupler Retrofit Instructions{6129,5057,5051}

Usage:

Challenger 65C (2ZJ1-1964),
Challenger 65D (2ZJ1965-Up),
Challenger 70C (2YL),
Challenger 75C (4KK),
Challenger 75D (5AR),
Challenger 85C (9TK),
Challenger 85D (4GR) Agricultural Tractors

Reference: Service Manual Module; SENR9440; Specifications; Hydraulic System; Challenger 65D, Challenger 75D, and Challenger 85D Agricultural Tractors.

Service Manual Module; SENR9439; Disassembly & Assembly; Machine Systems; Challenger 65D, Challenger 75D, and Challenger 85D Agricultural Tractors.

Service Manual Module; SENR5264; Specifications; Hydraulic System; Challenger 65C, Challenger 70C, Challenger 75C, and Challenger 85C Agricultural Tractors.

Service Manual Module; SENR5267; Disassembly & Assembly; Machine Systems; Challenger 65C, Challenger 70C, Challenger 75C, and Challenger 85C Agricultural Tractors.

The hydraulic coupler design is improved with the introduction of the E Series Agricultural Tractors. The improved couplers offer the advantage of being able to lever release the coupler while under pressure, which substantially reduces coupling and uncoupling forces.

The new coupler design can be adapted to the above machines by referring to Table B and Illustrations 1 through 3. If your machine is equipped with a three-point hitch, use Table B and C and Illustrations 1 through 7. See Table A.

You may need to modify 133-6298 Guard Group as necessary for final fit-up.

NOTE: Refer to the respective Specification and Disassembly & Assembly Manuals for correct bolt and fitting torques.

Illustration 1.
145-9544 Hydraulic Lines Group Front View

Illustration 2.
145-9544 Hydraulic Lines Group Right Side View

Illustration 3.
145-9544 Hydraulic Lines Group

Top View

Also use (along with Table B and Illustrations 1 through 3) Table C and Illustrations 4 through 7 if your machine is equipped with a three-point hitch.