Service Manual for Model MAF
This service manual has one purpose: to guide you in maintaining, troubleshooting, and servicing the MAF TorqmotorTM
(low-speed, high-torque hydraulic motor, MAF).
Material in this manual is organized so you can work on the MAF and get results without wasting time or being confused.
To get these results, you should read this entire manual before you begin any work on the MAF.
This manual also contains troubleshooting information and checklist. If you must service the MAF, the checklist will help
you to determine where the problem may be.
The three-column format of the Disassembly and Inspection, and Assembly sections will make it easier for you to
conduct major work on the MAF. Column 1 gives a brief key for each procedure. Column 2 explains in detail the
procedure you should follow. Column 3 illustrates this procedure with photographs. Pay special attention to the notes,
cautions, and warnings.
A foldout page with an MAF exploded assembly view is provided in this manual. The component part names and item
numbers assigned on this exploded assembly view correspond with names and item numbers (in parentheses) used in
the disassembly and assembly procedures set forth in this manual. When this exploded assembly view page is folded
out, you can easily identify components and locate their relative position on the exploded assembly view as you follow
the disassembly and assembly procedures.
An MAF service part list chart is also provided in this manual with the part names and exploded view item numbers cross
referenced to Ross Gear service part numbers.
Service parts are available through the Original Equipment Manufacturer (OEM) or Ross approved MAF Distributors.
As you gain experience in servicing the MAF, you may find that some information in this manual could be clearer or
more complete. If so, let us know about it. Do not try to second guess the manual; if you are stuck, contact us.
Servicing the MAF should be a safe and productive procedure, in order for the unit to deliver the reliable, long-life
operation engineered into it.