Model DX77
Installation, Operation and Maintenance
Page
12
Rev 06/17/2020
DX77-IOM-A.doc
L
IFTING A
V
EHICLE
1) Insure that the lift pads are completely down and
spotting blocks are clear of the drive path.
2) Center the vehicle over the pads in the service
bay and position the vehicle’s center of gravity
midpoint on the pads. NOTE: the center of gravity
is based on the weight distribution and is not the
same as the center point of the vehicle.
D
O NOT EXCEED
3850
POUNDS PER PAD
.
D
O NOT ATTEMPT TO LIFT THE VEHICLE WITH ONLY ONE
PAD
,
AS THIS WILL VOID THE WARRANTY
R
EFER TO THE VEHICLE MANUFACTURERS SERVICE
MANUAL
,
TECHNICAL BULLETINS
,
“V
EHICLE
L
IFTING
P
OINTS
G
UIDE
”
(ALI/LP-G
UIDE
)
OR OTHER
PUBLICATIONS TO LOCATE THE RECOMMENDED LIFTING
POINTS
.
3) Position the spotting blocks so all four pads
contact the vehicle simultaneously.
The vehicle should remain level during lifting
.
4) Raise the lift until all four wheels are off the
ground by pressing the UP button. Test the
stability of the vehicle by attempting to rock the
vehicle. Check adapters for secure contact with
vehicle lift points. If the vehicle seems unstable,
lower the lift and readjust. If the vehicle is stable,
raise the vehicle to a height a few inches above
the desired working height.
5) Press the DOWN button lower into the locks.
Lower the vehicle until the safety latches on both
pads engage. The vehicle should remain level
when both latches are engaged. If one side
engages and the other continues to descend, stop
lowering the vehicle, raise it several inches, and
try again to engage both latches.
Always lower lift into locks before entering the
area beneath the vehicle.
A
lways use safety stands when removing or
installing heavy components.
L
OWERING
A
V
EHICLE
1) Ensure that the area under the vehicle is clear of
personnel and tools.
2) If lift is sitting in the locks, raise the lift out of the
locks by pressing the UP button until the locks are
clear.
3) Lower the vehicle by first pressing the LOCK
RELEASE button, then the DOWN button. If pads
do not stay level during lowering, discontinue
lowering and check the lock mechanisms for
proper functioning. Once lift decent noticeably
slows down roughly 18” from ground, release the
LOCK RELEASE button and continue lowering.
Once completely lowered, remove the spotting
blocks and ensure the ramps are down.
M
AINTENANCE
To avoid personal injury, permit only qualified
personnel to perform maintenance on this equipment.
Maintenance personnel should follow lockout/tagout
instructions per ANSI Z244.1.
The following maintenance points are suggested as
the basis of a routine maintenance program. The
actual maintenance program should be tailored to the
installation. See ANSI/ALI ALOIM booklet for periodic
inspection checklist and maintenance log sheet.
If lift stops short of full rise or chatters, check fluid
level and bleed both cylinders per Installation
Instructions.
Replace all Safety, Warning or Caution Labels if
missing or damaged (
See Installation
instructions page 3
.
)
Daily
Keep lift components clean.
Check for loose or broken parts.
Check hydraulic system for fluid leaks.
Check spotting blocks for damage or excessive
wear. Replace as required with genuine Challenger
Lifts parts.
Weekly
Clean around base.
Monthly
Torque concrete anchor bolts to 40 ft-lbs.
Visually inspect concrete floor for cracks and/or
sprawls within 6” of base.
Lubricate slide tracks with heavy viscous grease.
(Grease channels of both pads)
Grease all pins.
Check synchronization of lift platforms, if it needs to
be adjusted please follow step 17.
If any problems are encountered, contact your
local service representative
.
