Micromatic, LLC
525 Berne St
Berne, IN 46711
1-260-589-2136 x3211 or 800-333-5752
[email protected]
Page
3
of
14
Repair Manual
–
26R-2 thru 26R-124
11NOV2019
MODEL: 26R
FIGURE 1 - Shaft
C.
Metal particles
–
Metal chips can be found from valve spools, Rotac
®
internal parts and
other metal components in the system.
The appearance of symptoms A, B or C above, will require total flushing and cleaning of the
entire hydraulic system.
2.
Clean all parts thoroughly and examine for defects.
A.
Shaft
(See FIGURE 1.)
1.
Examine welded vane for cracks at “A” diameter, splines, keyways and any other
area where stress may be applied.
a.
Spot-check by Magnaflux
Three different materials needed and applied in order:
SKC-S Cleaner
SKL-HF/SKL-S Penetrate
SKD-S Developer
FOLLOW DIRECTIONS CAREFULLY ON BACK OF THE CAN
b.
Keyways or splines that are worn
may fit loosely in couplings.
This problem will only get worse and
eventually cause shaft to break.
Causes
–
poor fitting coupling or
keys that are too soft. Over torque.
c.
Scoring on
‘
A
’
diameter. Any
scratch .010 or more requires
the part to be replaced. Edges
of the
‘
A
’
must be sharp!
d.
Scoring or galling on shaft
journal. This problem can be
repaired with hard chrome;
however, many critical
dimensions must be held
–
this type of repair must be
performed by factory only.
e.
Scoring or galling on the side face of the
“A” diameter. This is another problem
that can possibly be repaired; however, it is recommended that this type of
repair be performed by factory only.
B.
Housing/Head
1.
Scoring of .010
”
or more on the ID of the housing requires replacement of this part.
Any light scoring can be polished out with 400-grit emery cloth or its equivalent.
NOTE: When pressurized, the body will expand and contract. For this reason, plating
or sleeving is not recommended by the factory for repair.
