PDF Operating Manual Skyjack SJ 7127, SJ 8841, SJ 9250 Rough Terrain Scissor Lift - 1018 KB
This operating manual covers the Skyjack Mid-Size and Full-Size Rough Terrain Scissor Lift series, including models like the SJ 7127, SJ 7135, SJ 8831, SJ 8841, and SJ 9250.
It contains essential safety precautions, control functions, and pre-operation inspection procedures.
All operators must be familiar with the contents of this manual to ensure safe and efficient use of the equipment.
This guide is a critical on-the-job resource.
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MODELS SJ 7127 SJ 7135 SJ 8831 SJ 8841 SJ 9250
Operating Manual
Mid-Size & Full-Size Rough Terrain Series (ANSI/CSA)
157949AA-A April 2011
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Control Functions Section 2 - Familiarization
2.2 Component Identification 2.2-4 Base Control Console
The following descriptions are for identification, This control console is located at the rear of the
explanation and locating purposes only. hydraulic/electrical compartment. It contains the
following controls:
2.2-1 Main Power Disconnect Switch
This switch is located at the side of the hydraulic/ 1 2
electrical compartment.
3
1
Figure 2-1. Main Power Disconnect Switch
Figure 2-2. Base Control Console
1. Main Power Disconnect Switch - This switch,
when in “ ” off position, disconnects power 1. Lower/Neutral/Raise Switch - This switch controls
to all circuits. Switch must be in “ ” on position “ ” raising or “ ” lowering of platform.
to operate any circuit. Turn switch off when
transporting aerial platform. 2. Enable Switch - When selected and held, this
2.2-2 Motion Alarm “ ” switch allows the lift functions to
The alarm produces an audible sound when any control operate.
function is selected. On aerial platforms with certain
options, a flashing amber light will accompany this 3. Emergency Stop Button - This button “ ”,
alarm. when depressed, disconnects power to the control
circuit.
2.2-3 Tilt Alarm
The aerial platform is equipped with a device which
senses when the aerial platform is out of level in any
direction. When activated, it disables drive and lift
functions of the aerial platform and an alarm produces
an audible sound accompanied by the amber light. If
the alarm sounds, lower the platform completely, then
reposition aerial platform so that it is level before raising
the platform.
NOTE
If the tilt alarm sounds and the platform does
not, or only partially raises, immediately
lower the platform completely and ensure
that the aerial platform is on a firm level
surface.
FAMILIARIZATION
Mid Size & Full Size RTs
Page 12 December 2007
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings Engine Powered
contained in this operating manual and on the aerial platform.
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Section 2 - Familiarization Visual & Maintenance Inspection
Slider Scissor Assembly
Scissor Bumper
Limit Switch Maintenance
Support
Lift Cylinder
2.3-10 Lifting Mechanism • Scissor Bumpers
- Ensure bumpers are secure and shows
• Sliders no sign of visible damage.
- Ensure sliders are secure and there is no
visible damage. • Lift Cylinder(s)
- Ensure each lift cylinder is properly
- Ensure sliders’ path of travel are free from secured, there are no loose or missing
dirt and obstructions. parts and there is no evidence of
damage.
1. Raise the platform (refer to Section 3.8-2) until
there is adequate clearance to swing down the - Ensure all fittings and hoses are properly
maintenance support (refer to Section 3.12). tightened and there is no evidence of
hydraulic leakage.
• Maintenance Support
- Ensure maintenance support is properly 2. Raise the platform until there is adequate
secured and shows no visible damage. clearance to swing up the maintenance
support into storage bracket. Refer to
• Scissor Assembly Section 3.12.
- Ensure scissor assembly shows no visible
damage and no signs of deformation in 3. Fully lower the platform.
weldments.
- Ensure all pins are properly secured.
- Ensure cables and wires are properly
routed and shows no signs of wear and/
FAMILIARIZATION
or physical damage.
Mid Size & Full Size RTs
Engine Powered It is the responsibility of the operator toDecember 2007
read, completely understand and follow all instructions and warnings Page 23
contained in this operating manual and on the aerial platform.
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Function Tests Section 2 - Familiarization
Left-Rear Left-Front
Platform Control
Console
Right-Rear Right-Front
- Attempt to partially extend Right-Rear - With Right-Rear Outrigger partially
Outrigger (approximately 4”). extended, attempt to lift the platform.
Result: Outrigger will not extend. Result: Lift function will not operate.
- Attempt to partially extend Left-Rear - With Left-Rear Outrigger partially
Outrigger (approximately 4”). extended, attempt to lift the platform.
Result: Outrigger will not extend. Result: Lift function will not operate.
11. Lower the platform to stowed position. 14. Platform at stowed position.
Result: Lower function will operate. - Extend each outrigger until it raises the
tires up approximately 2”.
12. Raise the platform 1 foot from stowed
position and partially extend Left-Front - Retract the Left-Front Outrigger until the
Outrigger (approximately 4”). weight is resting on the corresponding
- Attempt to lift the platform. tire.
Result: Lift function will not operate.
- Extend the Right-Rear Outrigger until it
- Attempt to drive the aerial platform. makes contact with ground.
R e s u l t : Drive function will not
operate. - Attempt to lift the platform 1 foot.
Result: Lift function will not operate.
- Attempt to lower the platform.
Result: Lower function will operate. 15. Platform at stowed position.
- Extend each outrigger until it raises the
FAMILIARIZATION
FAMILIARIZATION
13. Platform at stowed position. tires up approximately 2”.
- With Left-Front Outrigger partially
extended, attempt to lift the platform. - Retract the Right-Front Outrigger
Result: Lift function will not operate. until the weight is resting on the
corresponding tire.
- With Right-Front Outrigger partially
extended, attempt to lift the platform. - Extend the Left-Rear Outrigger until it
Result: Lift function will not operate. makes contact with ground.
Mid Size & Full Size RTs
Page 34 December 2007
It is the responsibility of the operator to read, completely understand and follow all instructions and warnings Engine Powered
contained in this operating manual and on the aerial platform.
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Operator’s Responsibility Section 3 - Operation
3.7 Operator’s Responsibility Repairs to the aerial platform may only be made by a
It is the responsibility of the operator, prior to each work qualified service technician. After repairs are completed,
shift, to perform the following: the operator must perform visual and daily maintenance
inspections & function tests again.
1. Visual and Daily Maintenance Inspections
Scheduled maintenance inspections shall only
• are designed to discover any damage of be performed by qualified service technician (see
components before the aerial platform is put Table 4.8).
into service.
• are done before the operator performs the
function tests.
WARNING
Failure to locate and repair damage, and
discover loose or missing parts may
result in an unsafe operating condition.
2. Function Tests
• are designed to discover any malfunctions
before the aerial platform is put into service.
IMPORTANT
The operator must understand and follow
the step-by-step instructions to test all
aerial platform functions.
The operator should make a copy of the Operator’s
Checklist (see Table 4.9) and fill out the visual and daily
maintenance inspections and the function tests sections
while performing the items outlined in Section 2.3 and
Section 2.4.
IMPORTANT
If damaged or any unauthorized variation
from factory-delivered condition is
discovered, the aerial platform must be
tagged and removed from service.
Mid Size & Full Size RTs
Page 46 December 2007 Engine Powered
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Section 3 - Operation Loading/Unloading
NOTE 3.10-2 Driving
The mass of the aerial platform is as Before driving the aerial platform:
per Table 4.3. The center of gravity is
approximately located in the middle of the • Ramp or dock capacity must be sufficient to
aerial platform, front to back and side to withstand maximum aerial platform weight.
side, as illustrated in Figure 3-11. Vertically, • Ramp should be equipped with side guards to
the center of gravity is approximately just prevent inadvertent fall from the ramp.
above the base chassis. • Incline must not exceed aerial platform gradeability
(refer to Table 4.3).
NOTE • Aerial platform brake must be checked for proper
Except for Model 9250, the aerial platform operation.
can be lifted with a forklift from the sides, • Aerial platform speed must be on high torque
but Skyjack does not recommend this use. setting.
Lift with forks in designated pockets as
illustrated in Figure 3-12. WARNING
When transporting, the aerial platform
must be secured to the truck or trailer
deck. Tie downs are available as illustrated
in Figure 3-10.
Forklift pocket Forklift pocket
(Model 9250) (Models 71xx)
Figure 3-12. Forklift Pockets
Mid Size & Full Size RTs
Engine Powered December 2007 Page 57
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Tables Section 4
Table 4.7 Tire Specifications
WARNING
Air pressure can affect stability. Temperature changes can affect air pressure. It is important to
inspect all tires for proper tire inflation prior to use. Tires must be checked by end user on a daily
basis. Tire inflation pressures must be checked weekly with a calibrated gauge. If the measured
pressure is less than the specification, reinflate to the pressure specified below. Tires must not
be inflated above the recommended specification. Do not intermix tires of different types on one
aerial platform. Use only tires of type originally supplied.
Fill Specification Usage†
Tire Size MID SIZE FULL SIZE
Fill Ply Pressure (Factory)
7127
7135
8831
8841
9250
Type Rating (kPa)
10-16.5 75*
#6A 10 S S S S S
CARLISLE US LOADER (517.1)*
10-16.5 OTR OUTRIGGER 75*
#6A Air 10 O O O O O
(Non-Marking) (517.1)*
31-15.5-15 45*
#7A 8 O O O O O
GOODYEAR TERRA XTRAC (310.3)*
10-16.5
#6F 10 N/A O O O O O
CARLISLE US LOADER
10-16.5 OTR OUTRIGGER
#6F Foam 10 N/A O O O O O
(Non-Marking)
31-15.5-15
#7F 8 N/A O O O O O
GOODYEAR TERRA XTRAC
60378AG-ANSI-R
* Factory preset @ 20°C, Check pressures regularly as tires can lose pressure over time and over different ambient
temperatures even under normal conditions.
Backspace A
Rim Backspace Diagram Inboard Outboard
SECTION A-A A
Backspace
Rim Size
7127
Contact Skyjack Service 7135 8831 8841 9250
Serial Number
Department
3-3/4” 3-3/4” 4-3/4” 4-3/4” 3-3/4”
#6 & #6F
95 mm 95 mm 121mm 121mm 95 mm
#7 & #7F All models are 4-3/8”
60380AD-ANSI
WARNING
Intermixing tires of different types or using tires of types other than those originally supplied with
this equipment can adversely affect stability. Therefore, replace tires only with the exact original
Skyjack-approved type. Failure to operate with matched approved tires in good condition may
result in death or serious injury.
Mid Size & Full Size RTs
Page 68 December 2007 Engine Powered
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Section 5 Labels
Electrical Panel and Hydraulic/Fuel Compartment
9
1 8
7
Side View
Front View Rear View
2 3 4 5
6
No. Label Pictorial Description
Emergency Main Power Disconnect
Main power disconnect lever
1
Relay Names - Upper (Model 71xx)*
Relay names for Model 71xx electrical panel (upper bank)
2
*Note: Relay names will vary with differing units
Relay Names - Lower (Model 71xx)*
Relay names for Model 71xx electrical panel (lower bank)
3
*Note: Relay names will vary with differing units
Ground Circuit Breaker
Push to reset ground circuit breaker.
4
Power Circuit Breaker
Push to reset power circuit breaker.
5
Mid Size & Full Size RTs
Engine Powered December 2007 Page 79