wp20543 - Genuine International Steering Gear Box M100PMT3 - 1 - wisentpartscenter.com

Description

International 3554373C93 Steering Gear Box - Genuine Sheppard M100PMT3

The International 3554373C93 is the Sheppard M100PMT3 power steering gear box, built by R.H. Sheppard Co. as original equipment for International. It is a hydraulic recirculating ball gear with integral pressure relief that converts steering wheel input into output shaft rotation at the pitman arm.

Key Functions:

- Hydraulic power steering gear with integral pressure relief
- Converts steering column input to pitman arm output
- Sheppard M100 series, PMT3 configuration

Fitment & Specifications:

- Sheppard model: M100PMT3
- Cataloged by International as gear assembly, power steering, with pressure relief
- Pitman arm 3554377C1 is a separate part and is not included

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The 3554373C93 multiplies driver input into the force needed to turn a loaded front axle. Hydraulic pressure from the power steering pump acts on a piston inside the gear, which drives the sector shaft and the pitman arm. The integral relief valve caps pressure at full lock so the pump and hoses are not loaded against the stops.

Issue Symptoms / When to Replace

Excessive play or wander at the wheel, hard steering in one direction, groaning or shudder when turning, and steering that binds or catches at a point in its travel. Fluid leaking from the sector shaft seal or the input shaft seal, and fluid loss with no leak elsewhere in the system.

A steering gear that has been contaminated by debris from a failing pump will fail again quickly if the system is not cleaned out first.

Brand Information

R.H. Sheppard Co. has built hydraulic steering gears in Hanover, Pennsylvania since 1937 and supplies heavy truck manufacturers as original equipment. The M100 series is its Class 8 and vocational gear, and International catalogs the Sheppard unit under its own part numbers. A Sheppard casting and model tag on an International gear is the OEM part, not an aftermarket substitute.

Installation Notes

Flush the hydraulic system and fit a new power steering filter during installation. Debris left in the system from the failed gear or a worn pump will damage the new unit's valves, and skipping this step commonly voids warranty coverage on steering gears.

How to Identify an OEM Part

Sheppard casts its name and the model designation into the housing, and the M100PMT3 model tag identifies the exact configuration. Because Sheppard builds these as original equipment for International, the Sheppard name and model number on the gear are the OEM marking - there is no separate International-branded casting to look for. Confirm the International number matches 3554373C93 and the Sheppard model reads M100PMT3.

Why Buy 3554373C93 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.