Using Emergency Hydraulic Pump -706880089

TM 5-4210-233-14&P-1

2-15. EMERGENCY AERIAL PROCEDURES - Continued

b. Using Emergency Hydraulic Pump.

(1) Move SYSTEM LOCK lever to RUN position.

CAUTION

To avoid damaging emergency hydraulic pump, actuate desired

function before turning emergency hydraulic pump on.

Do not operate emergency hydraulic pump for more than 5

minutes at a time. Allow motor to cool for 1 minute before

reactivating emergency hydraulic pump.

(2) Engage desired hydraulic control lever.

(3) Push HYDRAULIC EMERG. POWER switch and hold (a maximum of five minutes) until hydraulic

function is completed.

(4) Release HYDRAULIC EMERG. POWER switch.

NOTE

If the main hydraulic pump and emergency hydraulic pump

malfunction, provisions have been made to allow for manually

lowering ladder and retracting outriggers. See para (b thru e)

below.

The manual operation of the hydraulic functions is intended only

to permit transportation of the aerial ladder to repair facilities.

Retracting Ladder Sections.

(1) On the aluminum valve block located on top end of

the lower two extension cylinders, loosen the 3/4 inch

lock-nut and remove protection cap. Turn allen screw

out

WARNING

To prevent possible injury, be certain all

personnel are clear of ladder before

retracting ladder.

(2) Move EXTEND/RETRACT hydraulic control lever to

RETRACT position. Ladder will retract.

(3) Unless the ladder is elevated to a high angle, a rope

will have to be used to provide full retraction of ladder

sections.

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