Usage:
D30D (3AJ1-304) Articulated Trucks
Reference: Service Manual Module, SENR8210; Disassembly & Assembly, D25D, D30D, D350D Articulated Trucks; Page 95; "Suspension Cylinders". This manual is part of Service Manual HENR8198 for D25D, D30D, D350D Articulated Trucks.
An improvement to the 6U-4480 and the 7U-9508 Cylinders including new end caps and seals is available through parts service for the listed machines. The new sealing package requires the modifications listed below.
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The suspension system may drop the machine suddenly, leaving no clearance between the axle housing, main frame, tires, and mud guards. Working in these areas can result in personal injury or death by crushing. Stay clear until the engine is stopped and the suspension is lowered to the service position.
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Use the appropriate service manual to remove the cylinders.
Remove the head from the cylinder. Machine the cylinder tube to the dimensions shown in Illustrations 1 and 2. A total of 2.5 mm (.10 in) needs to be machined from the end of the tube.
Illustration 1.
Illustration 2.
Detail of tube end from Illustration 1.
De burr the machined end at arrow.
Replace the 7U-1775 End Cap and 6U-3242 Seal (on 6U-4480 Cylinders) or the 2U-7690 End Cap and 138-9739 Seal (on 7U-9508 Cylinders) with the 140-7606 Head and 138-9740 Seal. The new head arrangement does not require the 6U-0954 Locking Ring.
Assemble the cylinders and install onto the machine using the above referenced service manual.