JLG 400S Service And Maintenance Manual page 318

SECTION 4 - BOOM & PLATFORM
2. Install the thrust washer (304) onto shaft (2) and end cap
(4).
3. Install the wiper seal (304.1/green o-ring) into the
groove on the shaft (2) and end cap (4) around the out-
side edge of the thrust washer (304).
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4. Using a seal tool install the main pressure seal (205) onto
shaft (2) and end cap (4). Use the seal tool in a circular
motion.
5. Install the wear guide (302) on the end cap (4) and
shaft (2).
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