6E3136 Pump G for CAT 3116, 3126, 3306 & more

The 6E3136 Pump G is a hydraulic pump assembly that pressurizes and circulates hydraulic fluid in heavy equipment hydraulic systems. It converts mechanical power from the engine into hydraulic energy that powers steering, lift, blade control, and other functions. This type of pump is often a piston‑type main or steering pump in motor graders and similar machines.

Here’s a general guide for proper installation:

1. Turn off the engine and safely relieve all hydraulic system pressure before beginning.
2. Locate the old pump and disconnect hydraulic lines, mounting bolts, and any electrical connections.
3. Carefully remove the old pump assembly.
4. Clean the mounting surface and inspect ports and fittings.
5. Install the new 6E3136 Pump G, align it with mounting holes, and tighten bolts to the torque specified in your service manual.
6. Reconnect hydraulic lines, refill the hydraulic reservoir with manufacturer‑specified fluid, and bleed the system as required.
7. Start the machine and check for leaks and proper hydraulic pressure.

The 6E3136 Pump G is compatible with a variety of Caterpillar equipment, especially motor graders and machines that require this specific pump part. These include CAT 120H, 120H ES, 120H NA, 120K, 12H, 12K, as well as some engine models like 3116, 3126, 3306, and C7 in applicable applications. Please reach out to Propel Parts for help verifying fitment.

Yes, the 6E3136 Pump G is manufactured to meet or exceed OEM specifications for performance and durability. Aftermarket versions like this are quality‑checked to ensure they fit and function similarly to the original Caterpillar pump, delivering reliable hydraulic flow and pressure under typical operating conditions.

Hydraulic pumps should be inspected during routine maintenance or at the first sign of declining performance. Regular checks include looking for fluid leaks, unusual noise from the pump area, reduced system responsiveness, or overheating. Replace the pump if it shows wear or failure to maintain required pressure.

Typical indicators include:

1. Reduced hydraulic performance (slow or weak actuator movement)
2. Unusual whining, knocking, or grinding noise from the pump area
3. Visible hydraulic fluid leaks around the pump or fittings
4. Overheating of the hydraulic system

A quality hydraulic pump like the 6E3136 ensures consistent fluid flow and pressure to critical systems—such as steering, blade control, and lift functions. Using parts that meet or exceed OEM standards improves reliability, reduces downtime due to failures, and contributes to long‑term equipment durability and performance.