Description

Dana Spicer R Model, HR Model Service Manual – Factory Documentation for Power Shift Transmissions

I’ve been turning wrenches for 28 years, and I’ve seen more transmissions ruined by aftermarket torque charts than by actual wear. That’s why when a Dana Spicer R Model or HR Model power shift transmission comes into my bay, I pull this Dana Spicer R Model, HR Model Service Manual from the shelf. 101 pages of factory-verified data, not some reprint from a third party. Page 2 alone tells you something most people skip: how to tow these units without destroying the transmission. Lift the rear wheels or disconnect the driveline. If it’s 4WD, disconnect both. And forget push-starting – the hydraulic system won’t let it. That kind of detail keeps you from making a $10,000 mistake. I’ve seen transmissions cost that much to rebuild.

That’s the kind of detail that saves transmissions.

This manual isn’t a glossy brochure. It’s the same binder a dealership tech would have used. The table of contents starts with “How the Units Operate” and dives into converter groups, pressure regulator valves, charging pumps, and oil filter groups. Every valve – the control valve assembly, solenoid control valve assembly – is broken down with factory tolerances. The mechanical parking brake section shows you exactly how to inspect and adjust the brake. If you’ve ever had a parking brake drag because someone guessed the clearance, you’ll appreciate the numbers here.

101 Pages of Factory Specs for R & HR Models

You get the full job: disassembly, cleaning and inspection, reassembly of low clutch, forward and 2nd clutch, 4th speed clutch. The “Specifications and service data-power shift transmission” chapter lists every torque value and fluid capacity. No need to hunt online for a forum post that might be wrong. This is Spicer Off-Highway’s own data. The screw ring gear installation procedure is covered twice – once in the main section and again as a separate procedure. That tells you it’s a critical step. Don’t skip it.

How the Units Operate – Transmission Assembly and Converter Group

Before you start swinging hammers, the manual walks you through theory of operation. The H32000 converter group, the modulating system, the hydraulic checks section. If you’re a DIY guy with a skid steer or a forklift that uses this transmission, read this section first. It’ll save you pulling a valve body apart when the problem is actually a clogged filter. The manual includes a troubleshooting guide with mechanical and hydraulic checks, plus low clutch pressure specs. I’ve used that guide to diagnose a slipping clutch in under an hour.

Control Valve Assembly: Manual vs. Electric Shift Procedures

Two versions of the control valve assembly are covered: manual shift and electric shift. The manual shows both with separate figures. If you’re working on an older machine with manual shift, you get the stack-up sequence and spring specifications. For electric shift, the solenoid control valve assembly section gives you the solenoid resistance checks and shift sequence. Do not try to swap parts between the two without consulting this manual – the valve body passages are different.

Mechanical Parking Brake Inspection and Adjustment

One of the most overlooked items on these transmissions. The manual dedicates a section to the mechanical parking brake. It shows the brake assembly, adjustment procedure, and wear limits. If the brake doesn’t hold on a slope, don’t only tighten the cable – the manual tells you to inspect the brake pads and the linkage. Page 2 also includes a warning about towing that ties into the brake – if the transmission is engaged while towing, you can cook the brake linings.

Why Factory Torque Specs Matter

You can find torque specs on the internet for free. But I’ve seen “minimum” and “maximum” ranges that are off by 20 ft-lbs. This manual gives you the exact values for the converter housing bolts, the clutch pack retaining nuts, the valve body bolts. The reassembly sections for each clutch include torque sequences. Use a calibrated torque wrench. If you overtighten the low clutch piston housing, you’ll distort the seal bore. I’ve had to rebuild a transmission because someone used a generic chart.

For other Dana Spicer transmissions, check out the Dana Spicer 1372-A Service Manual – Factory Specs & Rebuild Guide or the Dana Spicer ES60-5, CM59, ES60-5A, ES60-5C, ES60-5D Service Manual. If you work on industrial transmissions regularly, you might also want the Dana Spicer ES46-5 ES56-5 2002 Service Manual – 40 Pages of Factory Specs.

If you need a refresher on manual transmission fundamentals, this Manual Transmission article on Wikipedia is solid. The manual’s theory of operation section ties into the principles of a Manual Transmission – but this manual is specific to power shift transmissions.

Frequently Asked Questions

Does this manual cover the 4-speed HR model?

Yes. Both R and HR models, 3 and 4 speed.

What torque specs are included?

The manual includes specifications for all clutch packs, valve body bolts, converter housing, and brake assembly. Torque values are listed in the “Specifications and service data” chapter. For example, the low clutch pressure check procedure gives exact pressure ranges. Do not rely on aftermarket torque charts – they are often off by 10-15%. This manual gives you the numbers directly from Spicer Off-Highway engineering. If you need a specific bolt torque for the parking brake bracket, it’s in there. The forward and 2nd clutch reassembly section also details the bolt tightening sequence. Without factory data, you risk leaks and premature failure.

Is the wiring diagram included?

This is a hydraulic and mechanical service manual, not an electrical wiring diagram. It covers solenoid control valve assembly and shift solenoids, but not vehicle chassis wiring.

Can I use this for a Dana Spicer 1372?

No. This is specifically for R and HR Model transmissions only.

Stop guessing with generic PDFs. Access the Factory Manual and get the real specs. Your transmission – and your wallet – will thank you.