MTD 2010 Shop Manual page 23

For Parts Call 606-678-9623 or 606-561-4983
3,500 RPM
Figure 3.15
8XHLO 8XHL6
Figure 3.16
NOTE: DO NOT use teflon tape on any fitting on a MTD log splitter. Pieces of the tape can get into the system
and damage the valve or the pump.
NOTE: When tightening hoses with O-ring face fittings, hold the hose so that the center part of it does not
rotate against the O-ring while the swivel section is tightened. If the center part rotates, the O-ring can
be damaged and it will leak under pressure.
L. Start and run the log splitter to warm-up the fluid and check the test set connections for leaks. Cycle the
ram 12 times to purge air from the hydraulic system.
Hydraulic fluid under high pressure can be dangerous. A high-pressure hydraulic fluid leak or
spray can penetrate the skin. If this happens, seek immediate medical attention to reduce the
risk of blood poisoning leading to death or limb amputation.
If a hydraulic fluid leak develops at any time during testing or operation of the log splitter, turn it off and
repair the leak before any further work is done.
Exhaust fumes from running engines contain carbon monoxide (CO). Carbon monoxide is a colorless
odorless gas that is fatal if inhaled in sufficient quantity. Only run engines in well ventilated areas. If running
engines indoors, use an exhaust evacuation system with adequate make-up air ventilated into the shop.
Pump
Line to control valve
www.mymowerparts.com
H. Engine performance: See Figure 3.15.
• The engine should be adjusted to run at 3,500
RPM + 100. Check it with a tachometer.
• The engine must be in good state of tune: good
spark plug, clean air filter, fresh fuel, clean carbu-
retor, correct valve lash.
• The engine must be in good mechanical condition:
good compression.
• If the engine speed is set correctly, but it slows-
down excessively under load, there is an engine
performance issue.
• The engine performance issue must be fixed
before valid pump tests can be made.
I. With the engine turned-off, relieve hydraulic pressure
from the system by moving the lever on the control
valve through its full range of travel.
J. Connect the flow and pressure test gauge set
(P/N 759-3742) between the pump and the control
valve.
• The pressure gauge should be on the pump side.
• The flow meter should be on the control valve side.
NOTE: A 1/2" male JIC to 1/2" male O-ring face (OFS)
adapter (Parker Hannifin number 8XHLO) and a
1/2" male JIC to a 1/2" female OFS (Parker Hanni-
fin number 8XHL6) will be needed to connect the
test kit to the log splitter. See Figure 3.16. Inset.
K. Confirm that the needle valve on the test gauge set is
fully open and all connections are tight.
Hydrualic Diagnosis
19