avdel 0727 Serie Manual De Instrucciones página 57

TAIL JAW ASSEMBLY
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Unscrew locking ring 20 with special lock ring key* provided with the tool and withdraw the tail jaw cylinder assembly.
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Noting the orientation of each part, remove seal 19, jaw housing spacer 2, tail jaw housing 10, spring 8 and rubber spring sleeve 4.
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Using the circlip pliers* remove internal circlip 3.
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Invert tail jaw cylinder and shake out tail jaws 9.
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Place the hook on the lock ring key into the jaw slot of the jaw turret and piston assembly 6 and pull out the jaw turret and piston
assembly 6 forward.
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Remove screw 18 in the back of the jaw turret and piston assembly 6 with an Allen key* while holding the turret with a bar inserted
into the jaw slot of the turret.
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Clean out the hole in the turret using a 4.7 mm (
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Replace screw 18 using a suitable non-hardening sealing compound (e.g. Red Hermatite).
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Clean and inspect tail jaws 9, replacing if worn or damaged.
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Clean and inspect tail jaw cylinder assembly 7 for scoring of bore, for wear in the circlip groove or clogging of the airways.
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Clean jaw housing 10, inspect the internal taper for wear and check the vent hole is clear.
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Check that the free length of the spring 8 is 38.1mm (1.5").
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Replace rubber spring sleeve 4 if damaged.
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Grease tail jaws 9, turret and piston assembly 6 and the tail jaw cylinder assembly 7 with Moly Lithium EP3753 grease.
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Complete assembly in reverse order of dismantling.
BACK-UP RINGS
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To inspect condition of back-up rings 24, remove the tail jaw cylinder assembly 7 as described above.
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Slacken socket grub screw 25 in barrel nut 23.
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Undo the barrel nut 23 using two spanners*.
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Remove spacer 13 and spacing collar 39 and push barrel 59 forward.
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Withdraw bush stops 12, back-up ring 24 and buffer 15.
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When assembling, insert buffer 15, back-up ring 24 and bush stops 12. (It is essential that these parts are assembled in the correct
sequence). On replacement the barrel nut MUST be set with a torque wrench to 15 lbf/ft using the adaptor provided in tool service
kit.
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Complete assembly in reverse order of dismantling.
TAIL JAW VALVE (SIDE VALVE) - (07271 & 07274 Models)
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Remove by carefully prising off button 54 and withdrawing spindle 52.
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Clean and inspect 'O' rings for signs of wear or damage.
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Lubricate bore of valve with Moly Lithium EP3753 grease.
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Assemble in reverse order of dismantling.
* refers to items included in the Avdel service kit. For complete list see page 22.
3
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16
23