Advance Lifts Dock Lifts Pit Mounted Manual

							P 9-7  
						

							 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  SERIESSPEED
  
  
  
2000 1800
2000K1800
T SERIES1800
3000 1800
4100 1800
4200 3600
4300 3600
4400 3600
  
  
  
  
  
HORSEPOWER 
APPROX FULL
LOAD AMPS 
MIN COPPER WIRE SIZE (75C)
THW,THHN,THW
N,XHHWCIRCUIT
BREAKER AMPSDUAL ELEMENT,
TIME DELAY
FUSE AMPS
HORSEPOWE
R
APPROX FULL
LOAD AMPSMIN COPPE
R WIRE SIZE (75C)
THW,THHN,THW
N,XHHWCIRCUIT
BREAKER AMPSDUAL ELEMENT,
TIME DELAY
FUSE AMPS
13.6 14 15 5.611.814 15 2.8
1-1/2
 5.2 14 15 81-1/2 2.614 15 4
26.8
 14 15 10 2 3.414 15 5.6
39.6
 14 20 15 3 4.814 15 8
5 15.2
 12 30 25 5 7.614 15 12
7-1/2
 22 10 45 30 7-1/2 1114 20 17.5
10 28 8 60 40 101412 25 20
HORSEPOWER 
APPROX FULL
LOAD AMPS 
MIN COPPER WIRE SIZE (75C)
THW,THHN,THW
N,XHHWCIRCUIT
BREAKER AMPSDUAL ELEMENT,
TIME DELAY
FUSE AMPS
HORSEPOWE
R
APPROX FULL
LOAD AMPSMIN COPPE
R WIRE SIZE (75C)
THW,THHN,THW
N,XHHWCIRCUIT
BREAKER AMPSDUAL ELEMENT,
TIME DELAY
FUSE AMPS
1/2 9.8 14 20 15 1/24.914 15 8
3/4
 13.8 12 25 20 3/46.914 15 10
116123025 1 814 15 12
1-1/2
 20 10 40 30 1-1/2 1014 20 15
224105030 2 1214 25 17.5
3 34 8 70 50 3 17 10 35 25
5 56 - - - 5 28 8 60 40
TYPICAL MOTOR INFORMATION
MOTORS
115 VOLT 1 PHASE 230 VOLT 1 PHASEHORSEPOWER
5
5
5
5
NOTE: These tables are intended as a guideline, not to supersede national or local electrical 
codes. 7.5
7.5
7.55
P 9-8
230 VOLT 3 PHASE 460 VOLT 3 PHASE 
						

							 
 
 
 
 
1 
2  3 
4 
5  6 
7 
SECTION 10: IDENTIFICATION AND LABEL PLACEMENT 
No.   Qty.                     Location 
1.     (2)         Centers of handrail, both sides 
2.    (1)         Cylinder end, right side of platform 
3.     (4)         Centered on each side of platform 
4.     (4)         Upper vertical section of handrail 
5.    (2)         Outer leg 
6.     (1 per bridge)  Under bridge 
7.    (2)         Torque tubes each end
 
TYPICAL PLACEMENT 
(EACH DECAL KIT IS SUPPLIED WITH LOCATION INSTRUCTIONS) 
DECAL KITS BY MODEL/SERIES 
 
  SERIES 2000 (P-004-059)  SERIES 2000K (P-003-993) 
 
T SERIES (P-023-350) SERIES 3000 (P-004-261) SERIES 4000 (P-004-375) 
P 10-1 
Capacity 
Stickers on all 
four sides of 
platform  
						

							 
 
SECTION 11:  TROUBLESHOOTING 
 
 
A. Equipment does not rise; pump is running: (see also Section M) 
 
1.  The motor rotation may be reversed.  See the installation procedure on how to jog 
the motor to check for proper rotation. If the lift has been installed for some time and 
the motor is 3-phase, it is possible that the plant wiring “upstream” has been 
changed during plant maintenance or alteration, and the motor is now running 
reversed. A hydraulic pump can only run reversed for a short time (possibly 10 to 20 
seconds) without causing permanent pump damage. 
2.  Motor may be single phasing.  Check wiring and overloads to be certain that each 
three-phase line is present at the motor. 
3.  Voltage at motor terminals may be too low to run the pump at existing load.  Check 
voltage directly at motor terminals while pump is running under load. (Reading 
source voltage with the pump idling will not give accurate results).  Inadequate or 
incorrect wiring can starve the motor of voltage and current and will show up at the 
motor terminals when the motor is drawing the higher current that is required while 
motor is loaded. 
4.  Check for a hydraulic hose leak or pinching, and correct as necessary. 
5.  Check under the pump coupling to insure the key way has not slipped off the pump 
shaft. 
6.  Check for oil shortage in the reservoir and correct by filling the reservoir.  Refer to 
“Fluid Recommendations” in this manual for the correct fluid for your ambient 
temperature. 
7.  The suction filter in the reservoir or the pressure line filters in the pipe outlet of the 
power unit or the breather cap on the reservoir may be clogged.  Clean as required. 
8.  Check if the load is exceeding equipment ratings causing the relief valve to bypass 
the fluid back to the reservoir.  Never change the relief valve setting, these are 100% 
tested, adjusted, and locked at the factory.  Any change in the relief valve setting 
could cause your equipment either not to lift its capacity, or cause dangerous forces 
in the equipment, and void your warranty. 
9.  Check that the suction line fittings are not loose, causing the pump to pull in air 
instead of fluid.  Check for a hairline crack on the suction port of the pump.  The 
clear suction line should stay full of oil at all times, clear, and no air.  Check that the 
natural curve of the suction hose in the reservoir doesn’t cause the filter to rise out of 
the fluid. Re-install the suction line without rotating it and the tension of the hose will 
free the suction hose to lie against the reservoir wall and the filter to lay flat near the 
reservoir bottom.  If you have the short round “pancake” type of filter with the filter 
screen on the bottom of the filter, insure that it does not rest against the bottom of 
the reservoir, as this will restrict the flow to the pump. 
 
 
 
 
 
 
 
 
 
P 11-1 
 
  
						

							 
 
SECTION 11:  TROUBLESHOOTING (Continued) 
 
10. The down solenoid may be energized due to incorrect wiring, or mechanically stuck 
open, bypassing fluid. 
A.  Check the wiring.  Hold a non-magnetized screwdriver to the top of the down 
solenoid coil and press the up button.  If you can feel magnetism, the wiring is 
faulty. 
B.  Lightly tap the down solenoid to seat it properly.  Do not bang it hard, as internal 
stem parts may be permanently damaged. The solenoid coil can be removed, 
and the down valve removed for cleaning as explained in the hydraulic 
“Component Information” section. 
C.  Disconnect the pressure line from the valve manifold to the equipment.  Place a 
pressure gauge at the valve output, using high-pressure reducers.  Press the up 
button in a short jog and read the pressure.  Press the down button to relieve the 
pressure.  If the system will not put out the pressure indicated on the hydraulic 
diagram, the trouble is either the valves or pump.  If a load is not available, then 
the maximum hydraulic system pressure can be checked on a gauge by raising 
the unit to its full height momentarily against its physical stops. Proceed to step 
11 to determine which place the trouble exists. 
 
11.  The hydraulic pump may be inoperative. Disconnect a hydraulic line at the power 
unit, use a large bucket (5-gallon) and run the pump a short time.  If no flow appears 
either the pump or pump motor coupling inside motor mounting flange is defective, 
or pump rotation is reversed.  Connect a pressure gauge to the outlet of the pump, 
through a high-pressure tee and bleeder valve with hose to a bucket. Slowly turn the 
bleeder valve and see if the produces specified pressure. Do not close the valve all 
the way as the pressure buildup of a good pump could cause the pump to explode. If 
the pump does not put out the required pressure, then the problem is in other areas, 
such as a down solenoid valve leaking fluid back to the reservoir, allowing pressure 
not to be built up in the system. If the pump will not put out the required pressure, 
replace the pump. 
 
12. Repeated continuous type operation of the equipment may cause thinning of oil due 
to heat buildup. Feel the side of the reservoir to check the temperature of the oil. The 
equipment is intended for dock type operation, not elevator type operation that would 
make the equipment cost several times as much. The thin oil can cause the 
equipment not to rise, and in time, ruin the hydraulic pump. This type of operation 
could void the warranty considerations. 
 
B. Equipment raises too slowly: 
1.  Small amounts of foreign material could stick in the down solenoid, bypassing some 
of the fluid. Lower equipment and clean the down solenoid valve. 
2.  Foreign material clogging the suction filter, breather cap, pressure line filter, or a 
hose that is pinched. See A-4, 5, 6, 7 and 9. 
3.  Low motor voltage. See A-3. 
4.  Load exceeding equipment ratings. See A-8. 
5.  Oil may be too thick (ambient temperature) for proper operation. Refer to “ Fluid 
Recommendations”. 
 
 
P 11-2 
 
  
						

							 
 
 
SECTION 11:  TROUBLESHOOTING (Continued) 
 
6.  Equipment in which the cylinders are field installed may have incorrect alignment of 
cylinders, causing binding. Measure and ascertain that the cylinders are in the 
correct alignment with the equipment and with each other. Binding cylinders will 
often cause a “shuddering” vibration when the equipment is operating. 
7.  Oil may be too thin for ambient temperatures. See A-12 
 
C.  Motor labors or heats excessively:  
1.  Voltage may be too low. See A-3. 
2.  Wiring may be incorrect. Check that one leg of the motor lines is not open or 
grounded. 
3.  Pump may be overheating from oil starvation that develops high internal heat, 
heating   both the motor and the   pump, eventually causing pump failure. See A-1 
through A-9. 
4.  Oil may be too thick for ambient temperature. See “ Fluid Recommendations”. 
Binding cylinders. See B-6. 
5.  Pump may be overheating due to insufficient lubrication caused by oil being too thin. 
See A-12. 
 
D. Operation is “spongy”: 
 
1.  Bleed the cylinders to release trapped air by lowering the equipment to the fully 
down position and hold the down button depressed for an additional 20 seconds.  
Raise lift and repeat this procedure several times.  Check that the oil completely fills 
the clear suction hose at all times.  If the level falls back to the reservoir oil level, 
check suction lines and fittings for an air leak. 
2.  Check for oil starvation.  See A, 1-9. 
3.  Do not confuse “spongy” operation with small surges caused by foreign material on 
equipment wheel roller plates. 
 
 E.  Equipment lowers too slowly: 
1.  Pressure filter in pipe outlet of power unit may require cleaning.  See “ Component 
Information” for proper procedure. 
2.  Check for pinched hose, tubing, or obstruction in piping lines. 
3.  Check “Fluid Recommendations” for your ambient temperature type. Oil may be too 
thick.  See also H-6. 
4.  Foreign material in flow control valve.  With equipment fully lowered, remove and 
flush out any foreign material.  Do not change flow control setting, as equipment 
could be damaged by high speeds.  See “ Component Information” for proper way to 
remove, clean, and install the flow control valve. 
5.  Equipment having two down solenoid valves and/or flow control valves may have 
one valve inoperative. 
6.  Binding cylinders.  See B-6. 
 
 
 
 
 
 
P 11-3 
  
						

							 
 
 
SECTION 11:  TROUBLESHOOTING (Continued) 
 
F. Equipment lowers too fast: 
 
CAUTION! This can develop into a dangerous condition, the equipment reaching 
destructive speed.  Find and correct this condition before allowing use of this 
equipment. 
 
1.  Check for leaking hoses, particularly cracked fittings or other damage caused by 
equipment motion near the equipment and power unit, over-tightening of fittings until 
they develop hairline cracks.  Check underground conduits for evidence of fluid 
leaks. 
2.  Inspect the check valve.  The combination of the flow rates of the down flow control 
valve and a check valve stuck open due to foreign material, could increase the 
lowering speed.  See G-2. 
3.  If the equipment lowers initially at a normal rate, then speeds up as the equipment 
lowers, check the flow control valve(s).  Foreign material could stick, not allowing the 
pressure compensated function of the control to operate normally. See “Component 
Information” for the method of removal and replacement. 
4.  Oil may be too thin.  See A-12. 
 
G.   Lift raises then lowers back down: 
 
1.  Down valves may be incorrectly wired or stuck open due to dirt in the system.  See  
A-10, a. & b.  
2.  Check valve may be stuck open due to dirt in the system.  See “Component 
Information” for removal, cleaning and installation.  If pump and motor turns 
backward while the lift is lowering back down, the check valve is certainly 
inoperative. 
3.  Cylinder packing may be leaking.  Check for oil leakage, see “ General Hydraulic 
Information” and section on “Cylinder Repair Procedures”. 
4.  Check for leaking hoses, fittings, or evidence of oil in underground conduit runs. 
 
H. Equipment has raised but will not lower, or lowers partly: 
 
1.  Check both main and transformer secondary fuses. 
2.  Incorrect down solenoid wiring. 
3.  Stuck down solenoid valve.  See A-10b, however do not remove the down solenoid 
body, as the equipment will come down with nothing to hold it in place. 
4.  Faulty down solenoid coil. Coil can be removed safely for replacement.  As in step 3, 
do not remove valve body. 
5.  Down limit switch (if used) or electric toe guards (if used) inoperative or incorrectly 
wired.  If you have electric toe guards, check that the hydraulic hose is secured to 
the bottom of the pit so it cannot accidentally trip the electric toe guard. 
6.  Maintenance device or other object blocking down travel. Do not pry out any object 
blocking down travel, because the hydraulic pressure has already been removed 
when the down button was pressed, and the equipment will fall at a dangerous 
speed.  Raise the equipment slightly using the up button, remove object, then press 
the down button. 
 
 
 
P 11-4 
  
						

							 
 
SECTION 11:  TROUBLESHOOTING (Continued) 
 
7.  Improper oil for ambient temperatures.  Oil may be too thick, causing improper 
operation of velocity fuses (if used).  See “Component Information’ on velocity fuses. 
Warm the cylinders by wrapping heat tape (of the type used for water pipes) around 
the cylinder. Later, after operation is normal, change to proper oil as per “Fluid 
Recommendations”. 
8.  Binding Cylinders. See B-6 
 
I.  Equipment raises slightly, then equipment stops and motor stalls: 
 
Check the suction line filter. Filter may be clogged, allowing slight movement until 
grime seals off filter.  Check the suction filter for buildup of “varnish”.  If necessary, 
remove the suction filter, hold the suction hose down into the oil, and try normal up 
operation of equipment.  If operation returns to normal either clean or replace the 
suction line filter.  See the “Component Information” section for procedure and 
proper placement of the suction hose. 
 
J.  Oil leaking or spraying out of the reservoir: 
 
1.  Reservoir may be mounted on its side.  The motor should sit on top of the reservoir, 
the mounting bracket positioned vertical for lagging the power unit to the wall. 
2.  Clogged air breather allowing reservoir to build up positive pressure, then spraying 
oil.  Try unit operation with air breather removed and clean or replace the air 
breather if this corrects the condition. 
 
K.  Equipment will not raise, motor will not run: 
 
1.  Control fuse has blown. 
2.  Motor starter overload has tripped.  Depress reset button on controller. 
3.  Line fuse blown, single phasing motor or motor starter overload tripping.  See #2 
above. 
4.  Initial installation: Line voltage 230V and transformer wired for 460V.  This will give 
12V-control voltage instead of 24V, and motor starter will not operate.  Check to 
make sure motor was not wired for 460V before trying operation.  The same 
situation applies to 115V control voltage.  Use a good AC voltmeter to check for 
proper control voltage. 
5.  Check transformer for loose screw terminals at the various connection points 
including jumpers and under the fuse clips. 
6.  Check push button station for proper operation and its wiring to the controller. 
 
L.  Down solenoid or Magnetic Starter Coil burns out routinely: 
 
1.  Transformer may be wired wrong.  As an example, a 460V line with the transformer 
and primary wired for 230V will give the control voltage of 48V instead of 24V.  
(Same doubling voltage applies to 115V control transformers.)  This will burnout 
coils ranging from immediately to several month intervals, depending on the stamina 
of the coil.  Correct the condition. P 10-5 
2.  The transformer may be defective.  Check control voltage with a good AC voltmeter. 
 
 
 
P 11-5 
  
						

							 
 
SECTION 11:  TROUBLESHOOTING (Continued) 
 
3.  Although very rare, high voltage spikes may be coming in on the power lines at 
random, burning out coils.  This cannot be detected with a power company recorder, 
A “Varistor” can be purchased and easily installed on control systems to protect the 
coils.  More severe cases on both 115V or 24V control systems may need a special “ 
High Insulation Transformer” in place of the standard control transformer. 
 
M.  Equipment does not lift rated load, or raises load about 1” then stops: 
1.  Check troubleshooting section (A), 2 through 11.  Check if platform roller wheels roll 
freely with no binding as lift raises and lowers. 
2.  Lift may be overloaded.  If a lift is listed as capable of fork truck loading, bear in mind 
that most “sit-down” rider fork trucks weigh at least 5,000 to 7,500 pound empty. 
3.  Platform may be shifted or damaged from transit or unintentional abuse. 
A.  Check if the inside edge of the bevel toe guard is rubbing against the base frame 
in the fully lowered position.  Look for scratch marks on the base frame.  Bend 
back bevel toe guards as required and see “b” below. 
B.  Check if the platform roller wheels are running straight on their platform members 
as the lift raises and lowers and legs or wheels are not rubbing on nearby 
platform members.  Consult Advance Lifts on how to straighten out a platform. 
C. Check that the platform roller wheels are actually rolling as unit rises.
 
4. There may actually be no problem.  Many shipping tickets contain estimated weights 
much lower than the actual weight.  The lift may be seeing a load based on shipping 
tickets, well above lift capacity.  In this case the lift would not generally raise the 1” 
and stop, generally it will not lift at all from the full lowered position. 
 
N.  Breather lines do not stay connected. 
1.  Be certain that the lines are not pinched. 
2.  Check that there is no debris in the lines. 
3.  Once a line has been removed from the fitting, the hose must be cut back before 
reinstallation. 
4.  If lines are completely filled with oil, drain oil out and test cylinders for seal failures. 
5.  Remove breather lines from both cylinders and raise the unit fully to clear out oil 
“weepage” from cylinder housing. Once all the oil has been removed, reconnect the 
breather lines as described in #4. Raise the unit to full height again, breather lines 
will stay on if there are no obstruction or debris in the hose. Instruct the owner to 
raise the unit fully once a week to keep the buildup in the cylinder housing to a 
minimum.  
 
 
 
 
 
 
 
 
 
 
 
 
 
P 11-6 
  
						

							 
 
 
 
SECTION 12: ADVANCE LIFTS INC. PARTS AND LABOR WARRANTY 
 
 
For a period of two years from date of shipment from the Company’s plant, the 
Company agrees to replace or repair, free of charge, any defective parts, material or 
workmanship on new equipment. This shall include electrical and hydraulic 
components. 
 
For a period of ten years from date of shipment from Company’s plant, the Company 
agrees to replace or repair any defective structure. 
 
Company authorization must be obtained prior to the commencement of any work. The 
Company reserves the right of choice between effecting repairs in the field or paying all 
freight charges and effecting the repairs at the Company’s plant. The Company further 
reserves the right of final determination in all warranty considerations. Evidence of 
overloading, abuse, or field modification of units without Company approval shall void 
this warranty. No contingent liabilities will be accepted.
 
 
Damage incurred in transport is the responsibility of the carrier and is not covered by 
this warranty. Any damage detected upon receipt of equipment should be immediately 
reported to the carrier. If you need assistance filing your claim, please contact Advance 
Lifts.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
P 12-1