Pump and Fluid Systems
Chapter 5: Assembly/Disassembly
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MP-16 2-Piece 5000 psi January 2013
5.2.8
Turning the Main Gear
The main gear, like the connecting rods, is a precision piece of equipment, and should not be removed
unless it is absolutely necessary. If simply turning it to use the unworn side of the teeth, remove the
crankshaft assembly (see 5.2.3: Removing the Crosshead Guides)
Use the following procedure to remove the crosshead guides.
1
Remove the Crossheads as per 5.2.2.
2
Remove the four (4) bolts which affix the
crosshead guides to the frame.
NOTE
The upper guides are only
affixed to the frame by the
bolts, and so must either be
secured or removed during the
unbolting procedure.
3
Remove the crosshead guides.
Shims, if present, should be left in place if
the guide is to be reinstalled. If not, a new
shim package and realignment will be
necessary.
NOTE
It is extremely important to
make note of the size and
placement of shims during
removal. Failure to do so can
result in excessive piston and
liner
wear
due
to
misalignment.