JLG E300 Operator Manual - Manual (Page 68)

SECTION 5 - EMERGENCY PROCEDURES
5-2 – JLG Lift – 3121252
Platform or Boom Caught Overhead
If the platform or boom becomes jammed or snagged in
overhead structures or equipment, rescue platform occu-
pants prior to freeing the machine.
5.4 EMERGENCY TOWING PROCEDURES
Towing this machine is prohibited. However, provisions for
moving the machine have been incorporated. The following
procedures are to be used ONLY for emergency movement
to a suitable maintenance area.
THE ALLOWABLE TOWING SPEED IS 1.9 MPH (3 KPH). THE MAXIMUM
ALLOWABLE TOWING DISTANCE IS 0.6 MILES (1 KM).
1. Chock wheels securely.
2. Engage the mechanical release on both drive hubs by
loosening, completely reversing, and tightening the two
bolts on each hub.
3. Connect suitable equipment, remove chocks, and move
machine.
After moving machine, complete the following procedure:
1. Position machine on a firm level surface.
2. Chock wheels securely.
3. Disengage the mechanical release on both drive hubs
by loosening, completely reversing, and tightening the
two bolts on each hub.
4. Remove chocks from wheels as desired.
5.5 MANUAL DESCENT SYSTEM
(See Figure 5-1., Manual Descent Location)
The manual descent system is used, in the event of total power
failure or in case the key is not accessible to the ground person-
nel, to lower the upper and lower booms using gravity. The jib
lift cylinder must be pumped down. To operate the manual
descent system, proceed as follows:
1. Locate the manual descent knob on the boom function
valve. Push the knob in to lower the tower and pull the
knob out to lower the main boom. The knob must be
held in place to perform the lowering function; it is
spring loaded to return to center when released. Install
handle into manual descent pump and lower the
selected cylinders by pumping the handle until the
boom is completely lowered.
2. If equipped with a jib, locate the split ring on the boom
function valve. Push the split ring in to lower the jib or
pull the split ring out to raise the jib by pumping the han-
dle until it is completely lowered or raised. Stow the han-
dle in bracket provided.