Power Step PSA-D11R-FL, Руководство пользователя

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FOLDING LADDER
Caterpillar D11R Dozer
Section 1
Installation and Mounting Instructions (cont.)
Maintenance Notes
Pg8
PSA-D11R-F/L 210610
NOTE
Follow all on-site/Mine lifting and safety procedures when installing
Power Step Landings to Dozer.
WARNING
Raising the POWER STEP Landing by external means can create a vacuum in the
hydraulic cylinder and create the opportunity to allow air into the hydraulic system,
defeating the inherent safety features of the POWER STEP.
This must be avoided, to maintain safe operation of the POWER STEP.
In instances where the use of external means to raise the landing must be used,
please follow the following instructions:
Loosen hard plumbed hydraulic lines on cylinder side of lock valve on cylinder.
Raise landing by available means.
Note: Make necessary arrangements to collect displaced oil, and be aware that air enters
the piston side of the cylinder as landing is raised.
Lock in raised position.
Re-tighten hydraulic fittings.
SECURE THE LANDING IN THE RAISED POSITION, MECHANICALLY, CHAIN &
TAGOUT THE POWER STEP
To recommission the POWER STEP:
Loosen hydraulic fittings on cylinder side of lock valve.
Note: Collect displaced oil.
Lower landing to lowest position, using alternate safety approved means, fully retracting
cylinder. Ensure all personnel are clear of step radius.
Operate electrical control switch to purge air from the hydraulic line systems, lock valve
and cylinder.
Tighten the hydraulic fittings either side of lock valve to restriction fitting.
Cycle step unloaded several times to purge all air from hydraulic system.
The Power Step will not operate correctly if there is any air in the hydraulic circuit (due to
the incorrect operation of the lock valve).