Skyjack SJM Series User Manual

August 2007
SKYJACK, Page 24
Section 2 - Operation
SJM & SJII Series
2-17-b. Hydraulic (Machines with Velocity Fuses)
Emergency Lowering Valve (Rotary-type) - Located
in the hydraulic/electric tray, this valve allows platform
lowering in the event of an electrical system failure.
Figure 2-12b. Emergency Lowering Valve
1. Emergency Lowering Valve (Rotary-type) -
Turning the valve knob counterclockwise allows
the platform to gradually lower. Valve MUST be
fully closed (clockwise) to restore normal
operation.
Keep clear of scissor mechanism when using emer-
gency lowering valve.
Refer to “section 2-25” For Emergency Lowering
Operating Procedures
The following are descriptions of normal operating pro-
cedures. A qualified operator MUST read and completely
understand these descriptions before operating this
aerial platform.
2-18. Set-Up Procedure
1.
Remove all packing materials and inspect for
damage incurred during transport. This step is
normally only required after the equipment has
been unloaded and is being put into service
for the first time. Report any damage to delivery
carrier immediately.
2. Inspect aerial platform thoroughly and remove
any foreign objects.
3. Raise all guardrails to their upright position and
lock in place with locking pins. (Refer to “figure
2-1”)
2-17-a. Emergency Lowering System (Machines
with Holding Valves)
Emergency Lowering System - This system allows plat-
form lowering in the event of an emergency or an elec-
trical system failure.
Figure 2-12a. Emergency Lowering System
1. Emergency Lowering Valve - Located at the front
of the hydraulic/electric tray (item 1), this pull-type
valve when used in conjunction with the holding
valve manual overrides, allows platform lowering
in the event of an emergency or electrical system
failure.
2. Holding Valve Manual Override Knob - Located
on the holding valve at the bottom of each lift
cylinder (item 2), these red knobs when depressed
and turned counterclockwise allow hydraulic oil
to bypass each holding valve. The red knobs on
each holding valve MUST be depressed and turned
clockwise to restore normal operation.
Warning
Before operating this aerial platform check the
guardrail system for loose or missing locking pins.
The guardrail system must be upright and all pins
must be locked in place. Death or serious injury
could result if the guardrail system is not upright or
properly locked.
Warning
1
1
2

Skyjack SJM Series Specifications

General

Brand	Skyjack
Model	SJM Series
Category	Scissor Lifts
Language	English