TM 5-5420-280-23&P
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TELESCOPIC TUBE HYDRAULIC CYLINDER REPLACEMENT (Contd)
WARNING
Before disconnecting any hydraulic hoses you must relieve residual
hydraulic pressure from system and use care when loosening any
hydraulic tube or hose. Failure to comply may result in injury or
death to personnel.
NOTE
Removal and installation of right and left telescopic tube hydraulic
cylinders are performed the same way. Left side forward telescopic
tube hydraulic cylinder is shown.
REMOVAL
CAUTION
Cap or plug all hoses, connections, and openings immediately after
disconnection to prevent contamination. Remove caps or plugs prior
to installation. Failure to do so may result in damage to equipment.
NOTE
Tag hoses for installation.
Have container ready to catch oil.
1.
Disconnect two hoses (6) from elbows (5) on fittings (4) of telescopic tube hydraulic cylinder (3).
2.
Remove four snaprings (8), washers (9), two pins (1), and hydraulic cylinder (3) from telescopic tube
brackets (2) and frame rail brackets (10).
NOTE
Note position of elbows for installation.
3.
Remove two elbows (5), fittings (4), and O-rings (7) from hydraulic cylinder (3). Discard O-rings (7).
INSTALLATION
NOTE
Apply a light coat of oil to O-rings and grease to pins at
installation.
1.
Install two new O-rings (7), fittings (4), and elbows (5) on hydraulic cylinder (3).
2.
Connect two hoses (6) on elbows (5) of telescopic tube hydraulic cylinder (3). Do not tighten
nuts (11) and (13) until air is bled from cylinder (3).
NOTE
Have container ready to catch oil.
3.
Turn hydraulic cylinder (3) over so that elbows (5) are on top of cylinder (3).
4.
Loosen nut (11) on hose (6) and operate hydraulic cylinder (3). Refer to TM 5-5420-280-10. Extend
cylinder rod (12). This will bleed air from one side of hydraulic cylinder (3). Tighten nut (11).
5.
Loosen nut (13) on other hose (6) and operate hydraulic cylinder (3). Refer to TM 5-5420-280-10.
Retract cylinder rod (12). This will bleed air from other side of hydraulic cylinder (3). Tighten
nut (13).
6.
Repeat steps 4 and 5 until no air is coming from cylinder (3) at nuts (11) and (13).
7.
Install hydraulic cylinder (3) on frame rail brackets (10) and telescopic tube brackets (2) with two
pins (1), four washers (9), and snaprings (8).
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