Note, Service, Hydraulic cylinder leakage test – Troy-Bilt 14066 User Manual
Page 27: Piston
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SERVICE
Hydraulic Cylinder Leakage Test
Rod Seal Leakage Test
Start tractor and “Retract” Cylinders completely.
Continue to hold Control Valve Lever in position
to “Retract Cylinders” and check for evidence of
oil leakage past the Rod Seal (External Leakage).
Note:
On cylinders that have been in service, Rod Seal
leakage is usually indicated by accumulation of
dirt/oil at rod end of Cylinder Body.
If leakage is evident, the cylinder(s) should be
removed and disassembled for inspection and
repair.
Note:
Inspect Cylinder Rod for pitting, deterioration or
damage to the chrome finish. Any excessive
damage to the chrome finish reduces the ability
of the Rod Seal to seal properly.
If Rod Seal tests are satisfactory proceed to
Piston Seal Assembly Leakage Test.
Piston
Seal Leakage Test
With cylinders in
the
fully “Rétractée“ jîôsih'ûn
and tractor shut off, disconnect the hvdrau''c
lines from the base end of cylinders •
?.
hydraulic hese from the cylinder base
to a container (to catch oil during leak'd^« tes t.
Start tractor and place Loader
Lever in the position to “Retract” (
“Hold”.
Oentr:
‘ /iir
Check for oil leakage from base end
port
of
cylinders.
A constant dripping or very slight flow
of
oil is
normal. If a steady flow of oil is, evident ex
cessive wear or damage of the Piston Seal is in
dicated and the cylinder(s) should be removed
and disassembled for inspection and repair.
If Piston Seal Leakage Test in “Retract” position
indicates Piston Seal is satisfactory, reinstall
hydraulic hoses and fully extend cylinders to per
form test in “Extend” position.
With cylinders in the fully “Extended” position
and tractor shut off disconnect the hydraulic
lines from the rod end of cylinders. Route a
hydraulic hose from the cylinder rod end ports to
a container (to catch oil during leakage test).
Start tractor and place Loader Control Valve
Lever in the position to “Extend” Cylinders and
“Hold”.
Check for oii leakage from rod end port of
cylinders.
A constant dripping or very slight flow of oil is
normal. If a steady flow of oil is evident ex
cessive wear or damage of the Piston Seal is in
dicated and the cylinder(s) should be removed
and disassembled for inspection and repair.
90-4