BobCat E35 – CYLINDER (EXTENDABLE ARM) – Assembly

Clean all parts in solvent and dry with compressed air.

Inspect all parts for wear or damage. Replace any worn or damaged parts.

Always install new seals and O-rings. Lubricate all seals and O-rings with clean hydraulic fluid before installation.

Use the following tools to assemble the cylinder:

MEL1396 – Universal Seal Expander
MEL1033 – Rod Seal Installation Tool
MEL1396-2 – Piston Ring Compressor
MEL1075 – Adjustable Gland Nut Wrench
MEL1075-2 – Special Offset Pins

Install the seal on the tool and slowly stretch it until it fits the piston [Figure 20-28-13].

Allow the seal to stretch for 30 seconds before installing it on the piston.

Install the O-ring (Item 1) and seal (Item 2) [Figure 20-28-14] on the piston.

Use a ring compressor to compress the seal to the correct size. Leave the piston in the compressor for about three minutes [Figure 20-28-15].

Install the rod seal on the rod seal tool [Figure 20-28-16].

NOTE: During installation the spring side of the seal must be toward the inside of the cylinder.

Rotate the handles to collapse the rod seal [Figure 20-28-16].

Install the rod seal in the head [Figure 20-28-17].

Install the wiper seal with the wiper (Item 1) [Figure 20-28-18] toward the outside of the head.

Install the O-ring (Item 1) [Figure 20-28-19].

Install the back-up ring (Item 2) and O-ring (Item 3) [Figure 20-28-19].

Install the head (Item 1) and the piston (Item 2) [Figure 20-28-20] on the rod as shown.

NOTE: Clean and dry the rod threads. Install a NEW NUT with pre-applied Loctite®.

Grease the piston where the nut contacts the piston. Do not get grease on the threads.

Provide an adequate support for the cylinder before tightening.

Install the nut (Item 3) [Figure 20-28-20].

Tighten the nut to 153 N•m (850 ft-lb) torque.

Install O-ring (Item 1) and plug (Item 2) [Figure 20-28-21].

Tighten the plug to 50 N•m (37 ft-lb) torque.

Put the base end of the cylinder in a vise.

Insert the adjustable gland nut wrench into the two holes (Item 1) [Figure 20-28-22] to tighten the head. Head to be torqued until flush with the end of the housing.

Install the bushing (Item 1) [Figure 20-28-23]. The bushing must be aligned with the grease channel in the rod end of the cylinder.

Install the hoses (Item 1) [Figure 20-28-24] as shown to align the hoses with the bulkhead fittings on the inner arm assembly. Hose orientation can not be changed after the cylinder is installed.

 

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