Description

TRW Automotive THP, PCF 4.5, PCF 60 2001 Service Manual

You’re looking at a steering gear that’s been dead-nuts reliable for two decades—until some knucklehead grabs the wrong torque spec off a forum and cracks the housing. I’ve seen it. TRW Automotive THP, PCF 4.5, PCF 60 2001 Service Manual is what your shop needs to keep those gears on the road. 74 pages, 2001 print, straight from the manufacturer. Not a reprint, not a PDF cobbled together from photocopies. This is the original factory documentation.

Torque Chart on Page 7 — Don’t Guess

Page 7 has the torque chart. Every fastener spec is listed in Imperial units. If you’re doing a sector shaft adjustment or resealing the valve housing, you need those numbers. I’ve torqued head bolts on a Big Cam 400 for more hours than I care to count, and I still don’t pull numbers out of my back pocket. You shouldn’t either. The chart covers all critical fasteners on the THP, PCF 4.5, and PCF 60 series.

Does This Manual Cover Poppet Adjustment?

Yes. Poppet adjustment is the single most misunderstood procedure on these gears. The manual splits it into Single Gears (page 23) and Dual Gears (page 26). Dual gears have two sub-types: Mirror Image and Reverse Image. If you skip that section, you’ll either get a no-turn condition or you’ll blow a seal on the first lock. The procedure includes exact measurement steps and shim selection.

3 Safety Warnings You Need to Read

Page 2 lays out hazard warnings. A warning means death or severe injury. A caution means damage to the gear or property. A note just makes life easier. The disclaimer on the same page tells you something else: you are responsible for inspecting the gear before you start. If you see abnormal wear, stop. Call the vehicle manufacturer. Do not try to repair a damaged gear without replacing worn parts with original TRW stuff. I’ve seen guys skip that step and end up with a sector shaft in the shop ceiling. You do not want that.

Section 2: Initial Installation

Section 2 covers installation. Poppet setting is covered on page 13. Maintenance tips follow on page 14. Those tips include approved hydraulic fluids and grease specs—listed on page 6. Use anything else and you void the warranty. The manual lists gear specification numbers too, so you can cross-reference your unit.

On-Vehicle Service: Filling and Air Bleeding

Page 16 walks you through filling and air bleeding the system. Miss that step and you get cavitation, noisy steering, and premature pump failure. The input shaft seal replacement is on page 17. Sector shaft adjustment on page 21. I’ve done that job at least forty times. The manual’s exploded view on page 8 shows every O-ring, seal, and bearing location. If you lose a part, the service parts list on page 9 gives you the exact TRW part number.

Who needs this? DIY guys who want to rebuild their own steering gear without paying a dealer markup. Pro mechanics who bill by the hour and can’t afford to chase down a wrong spec. You’re not a beginner if you’re cracking open a steering gear, but you’re smart enough to get the factory document.

Why OEM matters. I’ve seen aftermarket manuals that list torque values off by 20 ft-lbs. That’s the difference between a gear that holds and a gear that leaks. This manual came from TRW Automotive in 2001. It’s the same paper the factory techs used. No guesswork, no third-party errors. For broader context on steering systems, read the Automotive Industry Overview. If you’re comparing steering gears to a Manual Transmission, note the differences in fluid requirements.

Related manuals you might need: White Outdoor LT-5 – 700 Series Rider Service Manual, Maruti MB308 Service Manual Procedures and Repair – Section: Section 8A Wiring D, HUSKIE Hydraulic Hammers Service Manual.

Is this manual only for the THP model, or does it cover PCF 4.5 and PCF 60?

It covers all three: THP, PCF 4.5, and PCF 60 series.

What year was this manual published?

2001.

Does it include an exploded view and parts list?

Yes. Page 8 has a full exploded view. Page 9 lists service parts with TRW part numbers.

Can I use this manual for a different TRW steering gear, like the TAS series?

No. This manual is specific to the THP/PCF integral power steering gears. TRW uses different designs for other series. The internal poppet arrangement, valve housing, and torque specs are unique to the THP/PCF family. Using this manual on a TAS or other gear will give you wrong procedures and likely damage the unit. Stick to the OEM manual for your exact model.

You’ve got the right gear and the right manual. Access the Factory Manual now and get that steering gear back on the road.