Issued July 2024
Maintenance and Adjustment
Copyright 2024, The Heil Co.
Printed in the U.S.A.
Maintenance and Adjustment
85
PTO INSPECTION AND PREVENTIVE MAINTENANCE
Due to normal torsional vibrations of transmission mounted Power Take-Offs (PTOs), it is important that Service Technicians
include the PTO/transmission interface in their standard inspection and maintenance schedules. If a PTO Inspection and
Preventive Maintenance schedule is not followed, it is possible that the PTO mounting screws can come loose, resulting in
transmission fluid leaks between the PTO and transmission and potential damage to the PTO or drive train
1. ACTIONS
The tools and materials necessary to perform the Inspection/Preventive Maintenance are shown in Table below.
Table . Tools and Materials
Personal Protective Equipment
Safety protection as required by employer
To tighten PTO mounting 10mm 12 pt. head screw s
To properly tighten PTO mounting screws
To make witness marks on the PTO mounting
flange
With the unit in Lock-Out/Tag-Out mode with the hydraulic pressure relieved, carefully follow the steps below.
A. PTO/Transmission Interface Inspection/Preventive Maintenance (MONTHLY/200 HOURS OF OPERATION)
(1) Inspect for transmission fluid leaking from the PTO/transmission interface. Thoroughly clean around this area.
(2) Using a torque wrench, check the PTO mounting screws. If they are set less than 45 FT-LBS, tighten to 45 FT-LBS.
(3) Using an oil-resistant marker, add a witness mark on each screw head and across the PTO mounting flange. For
future inspections, this will help identify if the PTO mounting screws loosen over time. See Figure below.
Witness Marks on PTO Mounting Screws
and Flange
(4) Take the unit out of Lock-Out/Tag-Out mode and operate unit functions.
(5) Check for transmission fluid leaks around the PTO/transmission interface. If there are leaks, contact Technical
Services.
(6) When there are no transmission fluid leaks, place the unit back into service.
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