Gradall 534C-10 (2460-4129) Service Manual - Manual (Page 51)

This Manual provides important information for those responsible for understanding, troubleshooting, testing,
repairing and/or performing maintenance on the hydrostatic transmission drive system of 534C-9 and 534C-10
Material Handlers.
NOTE!
This Manual does not cover any of the implement systems of the machine.
Accidents involving injury or serious machine damage
Immediately notify your GRADALL Distributor of the incident so he may assist you in your investigation of the
problem. If he is unavailable, contact the GRADALL Service Department at (330) 339-2211.
Related Manuals and Decals
Separate publications are furnished with your Material Handler to provide information concerning safety,
replacement parts operation, maintenance procedures and vendor components. Replacement manuals and
decals can be ordered from your GRADALL Distributor.
Orientation
When used to describe location of components on the machine, the directions front, rear, left and right relate
to the orientation of a person sitting in the operator’s seat in the cab.
Welding
General Warning Information
General Warning Information
(iii)
If welding on the machine becomes necessary, place the ground adjacent to the area being
welded. This will prevent arcing-between components such as bearings or machined
surfaces which could cause machine damage and downtime.
CAUTION
Welding rod repairs should meet 70,000 PSI minimum tensile strength, low hydrogen process.
The battery leads must be disconnected before welding to prevent damage to electrical components.
Fasteners
Grade 8 bolts are used whenever two machined surfaces or major assemblies are bolted together.
Torque values for the application will be called out.
Grade 5 bolts are used to fasten non-machined areas such as sheet metal. Refer to bolt torque chart
in Operator’s Manual.
Dowel pins are used in assemblies to absorb the shear load to these components and assist in correct
positioning for bolt insertion.
Testing and Adjustment Precautions
Read and understand the manuals named under the important safety notice heading above. Be sure
you are familiar with the machine’s response to controls.
Read and understand all material relating to area to be checked, adjusted or repaired.
This Manual covers hydraulic testing and adjustments. Read and understand material related to hydraulics before
proceeding with service of any kind on the hydraulic system. When performing maintenance, be sure there is no
residual, trapped hydraulic pressure.
If you are working with a helper, be sure he understands the procedure. Be certain each of you knows what to
Form No. 29633 3/97 534C-9 & 534C-10
HYDROSTATIC DRIVE PERFORMANCE CHECKS MANUAL
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