Alamo 5, 6 HYDRAULIC SYSTEM

MAINTENANCE

SB5/6 03/09 Maintenance Section 4-7

MAINTENANCE

HYDRAULIC SYSTEM

The pump and motor is the heart of the hydraulic circuit and is vital to the performance of all Triumph mowers.

Worn pumps and motors should be replaced or repaired. It is recommended that most customers replace

when this occurs however, spare parts and seal repair kits are available for field repair if desired. ALWAYS

DRAIN, CLEAN AND REFILL THE TANK WITH CLEAN OIL when pump repairs are made.

NOTICE: To avoid possible damage to a new or rebuilt pu mp, run the tractor engine at very low RPM for about

5 minutes with all control leve rs in neutral position prior to placing in service .

The major cause of valve malfunction is dirty oil or foreign material causing the valve spools to be scored or

seals to fail. If repairs are required remove the valve from the system and thoroughly clean all parts before

reassembly. Replacement parts and service kits are available. The valve body and spools are match fitted

and are not interchangeable or adjustable. Check the valve lever linkage for free movement to allow the

detents to locate without binding.

ALWAYS USE A SHARP KNIFE. A dull knife cuts poorly, may plug , and doesn't do a clean job. Keep the knife

straight with the sections firmly riveted to the knife back. When sharpening the knife, be careful to restore the

original shear angle and bevel of 23 degrees. Properly and improperly ground knife sections are shown in the

Fig. MntP-0005. A knife se ctio n that has b een gr ound several times m ay have the pr ope r ang le a nd bevel an d

still be unserviceable because the hard cutting edge has been ground aw ay and the section is too s hort to cut

everythin g en co un te re d .

Replace worn or broken knife sections. Triumph knife sections are heavy duty sections made of special steel

and will stay sharp for many more hours than conventional sections.