14Z-30-31111 Komatsu Spring

The 14Z‑30‑31111 spring is a heavy‑duty suspension/recoil spring used in Komatsu undercarriage systems to help maintain proper track tension and absorb shock during operation. It plays a key role in ensuring smooth movement of the track and loading components, protecting other parts from undue stress.

Here’s a general guide for proper installation:

1. Park the machine on level ground and shut off the engine.
2. Relieve any tension on the undercarriage or track adjuster assembly.
3. Safely support the components that the spring connects to.
4. Remove any retaining bolts or hardware holding the old spring.
5. Carefully take out the worn spring and inspect mounting points for wear or damage.
6. Install the new 14Z‑30‑31111 spring, making sure it seats correctly and aligns with mounting points.
7. Reattach any hardware and slowly release supports, ensuring the spring engages properly in the track adjuster assembly.

The 14Z‑30‑31111 spring is compatible with several Komatsu crawler dozers and heavy equipment models where this part number is specified, including D65WX‑15E0, D65PX‑12U, D65PX‑15, D65PX‑15E0, D65WX‑15, D85ESS‑2, and D60P‑12‑E among others. If you are unsure don’t hesitate to reach out to Propel Parts for help verifying fitment.

Yes. This spring is manufactured to meet or exceed OEM quality and durability standards, ensuring fitment and performance similar to the original Komatsu part. Aftermarket versions undergo quality checks to provide reliable function in demanding applications where consistent track tension and shock absorption are required.

Springs should be inspected during routine undercarriage maintenance, particularly if the machine operates in high‑impact or heavy‑load environments. Check for signs of weak tension, corrosion, bending, or cracking. If any of these issues are found, replace the spring to maintain proper track performance and prevent further damage.

Typical indicators include:

1. Loss of proper track tension
2. Excessive vibration or rough ride
3. Spring deformation, cracking, or corrosion
4. Unusual wear on track components

A quality spring ensures consistent track tension, shock absorption, and smooth undercarriage operation. Parts that meet or exceed OEM specifications enhance machine stability, reduce wear on other components, and contribute to improved uptime and durability especially in rugged working conditions.