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MAINTENANCE
AXTREME 03/09 Maintenance Section 4-11
©2009 Alamo Group Inc.
MAINTENANCE
TIMBER CAT HEAD
Lubrication/Daily Checks (Figure Mnt-0007)
Lubricate the grease fittings on top of the blade bar
every 4 hours. See Figure Mnt-0007.
Every 8 hours, lubricate the cylinder grease fitting
through the top slot in the cover. See Figure Mnt-
0007. Every 8 hours, check all bolts and nuts for
proper tightness. Tighten any bolt or nut found to
be loose. Periodically check the hydraulic connec-
tions for oil leaks. Visually inspect the hoses for
damage and replace as necessary. Periodically
inspect blade stroke adjustment by running the
head at normal operating speed (540 PTO) and
checking that the upper and lower blades line-up
perfectly the instant of reversal (when they change
direction).
Improper adjustment is also indicated by an abnormally high shock load on the hydraulic system during blade
reversal. This is due to the hydraulic cylinder reaching its stroke limit, causing the pressure relief reversing
components to engage. Continuous operation in this mode will result in oil overheating and premature failure
of components. If the unit is improperly adjusted, follow the stroke adjustment procedures below.
Stroke Adjustment (Figure Mnt-0008)
Position the head in a safe area for operation. If
necessary, barricade the head to prevent contact
while it is being operated.
Remove the cover and loosen the two jam nuts
(Item 1). See Figure Mnt-0008. Screw the two
spring bolt assemblies (Item 2) in toward the valve
push buttons. Start the unit and bring the speed up
to normal operating speed (540 PTO). Check the
blade overlap. Adjust the spring bolt assemblies
(Item 2), one by one until the upper and lower
blades perfectly align in the instant of reversal.
Never adjust the bolt assemblies to a point where
the hydraulic cylinder reaches it's stroke limit! This
is indicated by an abnormally high shock load on
the hydraulic system due to the pressure relief reversing components being engaged. Continuous operation in
this mode will cause premature component failure and hydraulic oil overheat. Once proper adjustment has
been achieved, tighten the jam nuts (Item 1) and replace cover.