Hofmann EELR739A Instruction manual

Rev. 12/03/2019
Installation, Operation & Maintenance Manual
Two Post Surface Mounted Lift
MODEL EELR739A &EELR740A
15,000 LB CAPACITY -3750 LB PER ARM
MODEL EELR741A &EELR742A
18,000 LB CAPACITY –4500 LB PER ARM
Snap-On Equipment
309 Exchange Avenue, Conway, Arkansas, 72032
Tel: [phone]
Fax: [phone]
IMPORTANT: READ THIS MANUAL COMPLETELY BEFORE
INSTALLING or OPERATING LIFT

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 2
Rev. 12/03/2019
15-18000-IOM-X.doc
GENERAL SPECIFICATIONS
See Figure 1 EELR739A EELR740A EELR741A EELR742A
AColumn Height 174” [14’-6”] 198” [16’-6”] 174” [14’-6”] 198” [16’-6”]
BFloor to Overhead Switch 167” [13’-11”] 191” [15’-11”] 167” [13’-11”] 191” [15’-11”]
CMax Rise Height w/ Stack Adapters
(Screw Pads Only) 84 9/16” (76 9/16”)
DScrew Pad Height 6 3/16” to 7 9/16"
EInside of Columns 119 7/8”
FOverall Width 154 3/4"
Stack Adapter Height 4” & 8”
Arm Reach (Min.-Max.) 38 1/2”-62”
Drive Thru Clearance 104 1/4”
Ceiling Height Required 176” 200” 176” 200”
* Lifting Capacity
(Hydraulic Pressure at Cap.)
15,000 lbs (3750 lbs. Per Arm)
(2150 psi)
18,000 lbs (4500 lbs. Per Arm)
(2575 psi)
** Rise Time 77 Sec. (approximate)
Motor
2HP, 1PH, 60Hz, 208/230 VAC 3HP, 1PH, 60Hz, 208/230 VAC
Optional – 2HP, 3PH, 50/60Hz,
for 208/230 or 460 VAC
Optional – 2HP, 3PH, 50/60Hz,
for 208/230 or 460 VAC
* Lift capacity ratings are based on loads equally distributed on all four arms.
** Lifting and lowering speeds may vary depending on the weight of the vehicle.

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 3
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WARNING
VERTICAL CLEARANCE
Check the height of the area where the lift is to be
installed. Clearance should be calculated based on
the full raised height of the lift.
Failure by purchaser to
provide adequate clearance
could result in unsatisfactory
lift performance, property damage, or personal
injury.
FLOORING
Be certain you have the proper concrete floor to
properly handle the loaded lift. Floor should be in
generally good condition with no large cracks,
spalling or deterioration.
Minimum requirements for concrete are 4 inches
minimum depth, with steel reinforcement, 3500
psi, cured for 28 days per local commercial
practice. Floor should be level within 3/8 inch over
the installation area. No anchors should be installed
within 8 inches of any crack, edge, or expansion
joint. If these conditions cannot be met, a pad may
be poured to accommodate the lift.
Check with local building inspectors and/or permits
office for any special instructions or approvals
required for your installation.
A qualified person should be consulted to address
seismic loads and other local or state requirements.
Failure by purchaser to
provide the recommended
mounting surface could result
in unsatisfactory lift performance, property
damage, or personal injury.
LOCATION
This lift has been evaluated for indoor use only with
an operating ambient temp. range of 5 – 40°C (41–
104°F)
ELECTRICAL REQUIREMENTS
For lift installation and operation it is necessary to
have a dedicated circuit with circuit breaker or time
delay fuse. Refer to wiring diagram for circuit sizing.
AIR REQUIREMENTS
This lift is equipped with an air operated lock release
system. The air supplied to the lift must be clean,
dry, lubricated, and regulated to 90-120 psi, FRL
(Filter/Regulator/Lubricator). The FRL must be
within 30 feet of lift. Failure to provide clean, dry,
lubricated, and pressure regulated air will void
warranty on pneumatic components.
SAFETY NOTICES AND DECALS
For your safety, and the safety of others, read and
understand all of the safety notices and decals
included here.
READ ENTIRE MANUAL BEFORE ASSEMBLING,
INSTALLING,OPERATING,OR SERVICING THIS
EQUIPMENT.
PROPER MAINTENANCE AND INSPECTION IS NECESSARY
FOR SAFE OPERATION.
DO NOT OPERATE A DAMAGED LIFT.
Safety decals similar to those shown here are found
on a properly installed lift. Be sure that all safety
decals have been correctly installed on the Power
Unit reservoir. Verify that all authorized operators
know the location of these decals and fully
understand their meaning. Replace worn, faded, or
damaged decals promptly.
Do not attempt to raise a
vehicle on the lift until the lift
has been correctly installed
and adjusted as described in this manual.
WARNING
WARNING

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 4
Rev. 12/03/2019
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RECEIVING
The shipment should be thoroughly inspected as
soon as it is received. The signed bill of lading is
acknowledgement by the carrier of receipt in good
condition of shipment covered by our invoice.
If any of the goods called for on this bill of lading are
shorted or damaged, do not accept them until the
carrier makes a notation on the freight bill of the
shorted or damaged goods. Do this for your own
protection.
NOTIFY Challenger Lifts AT ONCE if any hidden
loss or damage is discovered after receipt.
IT IS DIFFICULT TO COLLECT FOR LOSS OR
DAMAGE AFTER YOU HAVE GIVEN THE
CARRIER A CLEAR RECEIPT.
File your claim with Challenger Lifts promptly.
Support your claim with copies of the bill of lading,
freight bill, and photographs, if available.
Component Packing List
PART # QTY/
LIFT DESCRIPTION
15000 18000
12001 12001-18 1 POWER COLUMN ASS’Y
12002 12002-18 1 IDLER COLUMN ASS’Y
12004 1 OVERHEAD PACK
15-18000-HW-X 1 HARDWARE BOX
B12048S-1 4 ARM ASSEMBLY
12102 2 COLUMN EXT.(14’-6” O.A. HT.)
12022 COLUMN EXT.(16’-6” O.A. HT.)
12074 1 OVERHEAD SHUTOFF BAR ASS’Y
12045 1 OVERHEAD LIMIT SWITCH
12100 2 SYNC.CABLE ASS’Y (14’-6”)
12019 SYNC.CABLE ASS’Y (16’-6”)
B12069 4 ADAPTER EXTENSION (4”)
B12068 2 ADAPTER EXTENSION (8”)
12071 2 ADAPTER RACK
12093 4 ARM RESTRAINT ASSEMBLY
12119 12087-19 1 POWER UNIT –SINGLE PHASE
12089 12089-19 POWER UNIT –THREE PHASE
15-18000-LP-X 1 LITERATURE PACK
ACCEPTED OILS –Do not use oils with detergents
Hydraulic fluid is not provided with the lift shipment
-10 wt. anti-foam, anti-rust hydraulic / biodegradable oil
-Dexron III ATF
INSTALLATION
SAFETY REQUIREMENTS FOR INSTALLATION AND
SERVICE
Refer to ANSI/ALI ALIS (current edition)
IMPORTANT:Always wear safety glasses while installing lift.
TOOLS (MINIMUM REQUIRED)
a. Tape measure, 16ft
b. Chalk line
c. 4ft level
d. 10” adjustable wrench
e. Standard open end wrenches 7/16”, 1/2",
(2) 9/16”, (2) 11/16”, 3/4"
f. 5/16” allen wrench
g. Needle nose pliers
h. Hammer drill with 3/4” diameter carbide tipped
bits
i. 2 lb hammer
j. Torque wrench: 150 foot pounds minimum with 1
1/8” socket
k. 12 ft. Step ladder
l. Anti-Seize lubricant (for arm pins and foot pad
screw threads and stop rings)
LAYOUT
1) Layout the service bay according to the
architect’s plans or owners instructions (see Fig.
1b). Failure to install in this orientation can
result in personal and property damage. Be
certain that the proper conditions exist, see page
3.
2) Assemble column extension to column using
3/8”-16 x 3/4" lg Hex flange head bolt. Repeat for
opposite column and extension.
3) Erect and align both column assemblies.
LOCK RELEASE/PAWL
Fig. 2 – Locking Pawl Assembly

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
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Rev. 12/03/2019
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4) Install the locking pawl, actuator, and spring
(Fig. 2). Adjust air cylinder clevis to retract lock
against inside of back of column when air
cylinder is fully extended. Tighten air cylinder
clevis jam nut against clevis.
ANCHORING
5) The anchor bolts must be installed at least 8”
from any crack, edge, or expansion joint.
6) Use a concrete hammer drill with a 3/4 inch
carbide bit. Tip diameter should conform to ANSI
Standard B94.12-1977 (.775 to .787). Do not use
excessively worn bits or bits which have been
incorrectly sharpened. A core bit may be
necessary if an obstruction is encountered.
Never substitute with shorter anchor.
7) Recheck “Inside of Columns” dimension (Fig. 1).
Drill the anchor holes using the base plate as a
template. Drill through the floor if possible or to a
depth of 5 inches minimum.
Complete steps 8 thru 11 for the six (6) exposed
anchors around each column, then raise the
carriages. Repeat steps 8 thru 11 for the two (2)
anchors under each carriage.
8) Vacuum dust from the hole for proper holding
power.
9) Shim both columns to plumb using the shims
provided as shown in Fig. 3. DO NOT shim more
than 1/2" at any given point. Use a level no less
than 24” in length to plumb columns.
10) Assemble washer and nut to anchor with nut just
below impact section of bolt. Drive anchor into
hole until nut and washer contact base.
Fig. 3 – Column Shimming
11) Tighten power column anchors and recheck
column for plumb. Re-shim if necessary. Torque
to 150 foot pounds to set anchors.
OVERHEAD
12) Before raising overhead into position install 4
each (2 per column) hex flange bolts and nuts in
bottom hole of column extension (see Fig. 4
Installation Aid) for temporary support of
overhead. Lift overhead assembly up into
position and install with 8 each (4 per column)
3/8”-16 x 3/4” lg. hex flange bolts and hex flange
nuts per side as shown in Fig. 4.
Fig. 4 – Overhead Assembly
13) Check idler column shimming. Use additional
shims (see Fig. 3) to remove any gaps that may
have been created while installing overhead
beam. Tighten anchor bolts and re-check column
for plumb. Torque to 150 foot pounds.
14) Install Overhead Limit Switch to the Overhead
Beam using the rear set of holes on the Power
Side of the lift. Fig. 5.
Fig. 5 – Overhead Limit Switch Power Side

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 6
Rev. 12/03/2019
15-18000-IOM-X.doc
15) Install the Idler Bracket to the Overhead Beam
using the rear set of holes on the Idler Side of
the lift. Fig. 6. Note the orientation of the Idler
Bracket. The narrow slot needs to be facing
towards the Power Column. Slide the Shutoff
Bar over the limit switch on the Power Side. Pin
the Shutoff Bar to the Idler Side Bracket with the
10mm dia. x 55mm Lg. clevis pin & hairpin
cotter.
Fig. 6 – Overhead Bracket Idler Side
16) Assemble the cable trapping hardware with a
3/8”-16 x 3” Lg bolt with (2) 3/8”-16 flange nuts at
each upper sheave location. For the lower
sheaves, use a 3/8”-16 x 3/4" Lg. bolt and a 1/4"
dia. x 1 3/4" Lg. clevis pin (Fig. 7). At the upper
and lower sheave connections, disassemble and
reassemble the cable trapping hardware.
Fig. 7 – Cable Trapping
SYNCHRONIZER CABLES
17) Manually raise the carriages to a common lock
position, to gain access to the top of the
carriage.
Insure that the top of the hydraulic cylinder is
out of the way but still retained in the
opening of the top plate of the carriage as
shown in Fig 8.
Failure to follow previous step
could result in personal injury.
Fig. 8 – Cable Assembly
C A U T I O N

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 7
Rev. 12/03/2019
15-18000-IOM-X.doc
18) Route the synchronizer cables as shown in Fig.
9. Routing the cable from the inner hole location
on the top of the carriage down to the column
pulley and up to the overhead pulley. From the
other hole location rout the cable up to the
overhead pulley.
Fig. 9 – Cable Assembly/Cable Extensions
POWER UNIT &HYDRAULIC LINES
19) Mount Power Unit to power column as shown in
Fig. 10. The mounting hardware, (4) 5/16”-18
hex nuts, are pre-installed on power unit
mounting bracket. AULIC LINES
Fig. 10 – Power Unit Mounting
20) Connect the cylinder line to the overhead line
using a tee. Install the power unit line to the tee
in the Power column and to the power unit outlet
port. Install hose clamps with a 3/8”-16 x 3/4”
hex flange bolt and 3/8”-16 hex flange nut. Install
(2) hose clamps in overhead and (1) hose clamp
in each column extension (Fig. 11).
Fig. 11– Power Side Column Ext.
Hyd. Routing
21) Thread 9/16”-18 O-ring elbow (in hardware box) into
power unit. Attach free end of power unit hose
to elbow. See Fig 12. CAUTION do not damage
rubber O-ring.
Fig. 12-Power Unit Connection
22) Install (1) hose clamp on the outside of the
power column with a 3/8”-16 x 3/4” hex flange
bolt and 3/8”-16 hex flange nut. Install (1) line
clamp with a 1/4”-20 x 3/4” hex flange bolt and
hex flange nut (Fig. 13).

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 8
Rev. 12/03/2019
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Fig. 13-Hose and Line Clamps
23) Hoses should connect to cylinders with a 90
degree elbow rotated 25 degrees upward and
be routed thru hose guide (Fig. 13B).
Fig. 13B-Hose Connection
24) BE CERTAIN ALL FITTINGS AND CONNECTIONS ARE
TIGHT. IT IS THE INSTALLERS RESPONSIBILITY TO
INSURE SYSTEM IS LEAK-FREE. Fill the Power Unit
with three gallons of clean 10wt anti-foam anti-
rust hydraulic oil or Dexron III ATF. DO NOT USE
OILS WITH DETERGENTS.
LOCK RELEASE
25) On the Power Column, attach the 1/8” air line
from the lock release air cylinder to the push-lock
tee fitting. Run another section of 1/8” air line
from the button valve to the tee (Fig. 14).
26) Connect the rest of the 1/8” air line to the top of
the tee and run it up the column attaching it to
the hydraulic line using wire ties (Fig. 14).
Fig. 14-Lock Release
27) After running the 1/8” air line along the hydraulic
line in the overhead and out the other opening in
the Idler Column (Fig. 14), run the air line down
the column using adhesive tab and wire ties.
Attach it to the lock release air cylinder (Fig. 14).
ARM INSTALLATION
28) Lubricate the arm pin or carriage arm pin hole
with “anti-seize” and install the arms. Insure that
the arm restraint gears engage and disengage
properly. Arm restraints should disengage when
lift is fully lowered (Fig. 15).
29) Extend the footpad to both extents and apply
“anti-seize” to the retaining ring.
Fig. 15-Arm Installation
30) Make sure all the arm bolts are tight using a 3/8”
hex key. Slide all the arms out so they are fully
extended making sure that the male is retained
in the female.

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 9
Rev. 12/03/2019
15-18000-IOM-X.doc
ADAPTER RACK INSTALLATION
31) Locate the two pre-drilled holes on the back of
each column 19” up from the top of the base
plate and tap 5/16”-18. Center the adapter rack
and attach with 5/16”-18 x 1" Lg hex flange cap
screw and 5/16”-18 hex flange nut (Fig. 16).
Fig. 16-Adapter Rack Installation
ELECTRICAL
See Figure 17 for the following steps.
32) Wire tie Limit Switch cord to column hydraulic
line and power unit line.
33) Connect the Overhead Limit Switch Cord to
Power Unit as shown in Fig. 17.
34) Connect Power Unit to suitable electrical source
as shown in Fig. 17.
35) IMPORTANT:AFTER WIRING HAS BEEN
COMPLETED,TEST OPERATION OF POWER UNIT &
OVERHEAD LIMIT SWITCH.WHILE RAISING LIFT,
OPERATE OVERHEAD SHUTOFF BAR.POWER UNIT
MOTOR SHOULD STOP WHEN SHUTOFF BAR IS
RAISED.
FINAL ADJUSTMENTS HYDRAULICS
36) Lower the lift to the floor and raise the lift
approximately one foot.
37) Start with Idler side first. Slowly and carefully
loosen the bleed plug on top of the cylinder just
enough to allow the entrapped air to escape.
Repeat for power side.
38) Raise lift 6 inches. Repeat step 36 until no air
comes out of cylinder.
39) Pressure test hydraulic system. Energize power
unit, raise lift to full rise and continue to run
motor for additional 10 seconds. (NOTE:
pressure relief will make a high pitch squeal
sound for these 10 seconds.) Check hydraulic
system for leaks.
40) Energize power unit again for 10 seconds. With
a clean rag, wipe down both cylinder rods. (The
cylinders are shipped with a small amount of
clear anti-corosive lubricant that will be forced
out through the wiper when the lift reaches full
rise.) If lubricant is not wiped clean from the
cylinder rod, the cylinder will apear to be
leaking.
SYNCHRONIZING CABLES
41) Raise lift and insure carriages lower into same
lock position.
42) Adjust synchronizing cables so the tension is
equal in both cables and carriages are firmly
sitting on locks.
43) Cycle lift to insure that latches operate
simultaneously. Adjust if necessary.
OWNER/OPERATOR CHECKLIST
44) Demonstrate the operation of the lift to the
owner/operator and review correct and safe
lifting procedures using the Lifting It Right
booklet as a guide.
45) Return all provided literature (including this
manual) to the literature pack envelope and
deliver the envelope to the
owner/operator/employer.
46) Complete the online warranty registration (refer
to the included warranty statement).

Models EELR739A and EELR740A
Models EELR5741A and EELR742A
Installation, Operation and Maintenance
Page 10
Rev. 12/03/2019
15-18000-IOM-X.doc
1
5
4
6
(Normally Open)
M
FIELD
CONECTIONS
FIELD
CONECTIONS
A2A1
T9
T5
T4
T6
M
T8
T3
T7
T2
T1
12
34
56
L3
L2
L1
T3
T2
T1
FACTORY WIRED FOR
208−240V
6
4
2
5
3
1
RECONNECTIONS FOR
440−480V
T3
T2
T1
T9
T6
T7
T4
T8
T5
FOR THREE PHASE
M
FOR SINGLE PHASE
Wiring Diagram
Fig 17 – Electrical Wiring Diagram