Model Number ___________________
Serial # _________________________
Date placed in service _____________
IMPORTANT: READ CAREFULLY
BEFORE INSTALLING OR OPERATING LIFT
Part orders are subject to a $50 miminum charge.
April 2007
This manual was current at the time of printing. To obtain
the latest, most updated version, please contact Presto Lifts
Customer Service Department or go to our website:
www.PrestoLifts.com -- you will find a complete list of
current owner’s manuals to print.
This manual attempts to provide all of the information
necessary for the safe and proper installation, operation and maintenance of Presto Lifts Inc.'s MSeries
Stackers. It is important that all personnel involved
with the installation, maintenance or operation of the
stacker read this manual. Where unique situations arise,
that are not covered in this manual call Presto Lifts for
further instructions. Additional manuals are available
upon request or on our web site at www .prestolifts.com.
• Do not put hands or feet on or near the mast
while the forks or platform is in motion.
• Do not stand, sit or climb on the lift.
• Do not exceed the load capacity.
• Place all loads centrally located on the lift forks or
platform.
• Do not place a load on a moving lift.
• Do not use the lift on soft, uneven or unstable
surfaces.
• Do not shock load the forks or platform. Materi-
als must be carefully placed rather than dropped.
The stacker has a nameplate that provides the load capacity ratings, serial number and model identifications.
Please refer to these numbers when ordering parts or
requesting further information.
WHERE UNIQUE SITUA TIONS ARISE, THAT ARE
NOT COVERED IN THIS MANUAL, CALL PRESTO
LIFTS SER VICE DEP AR TMENT FOR FUR THER INSTRUCTIONS.
S E C T I O N 2
SAFETY
The M Series stackers are very capable of causing serious injury or damage if adequate precautions are not
taken. By reading and following this manual, operator
injury may be prevented.
DO NOT INSTALL OR OPERATE THESE LIFTS
WITHOUT CAREFULLY READING THIS
MANUAL. In order to provide for the safe operation
of these stackers, Presto Lifts Inc. has identified certain
hazards that may occur during the installation, maintenance and use of these lifts.
S E C T I O N 3
INSTALLATION
INSTALLATION
When the stacker arrives on a pallet the following steps
are to be followed:
1. Through the use of a forklift or overhead hoist, pick
the stacker unit up taking into consideration the center
of gravity. The center of gravity of the unit should be
adequately supported.
2. Once the unit is lifted from the pallet by a couple of
inches, remove the pallet from under the stacker.
3. Follow the next sections to ensure proper operation.
S E C T I O N 4
OPERATION
METHOD OF OPERATION:
In order to operate the lift follow these operating procedures.
WARNING!
• Do not perform any repair work on lifts if there is
a load on the platform or forks are in the raised or
lowered position.
• All personnel must stand clear of the lift when the
lift is in motion.
• Do not put hands or feet under forks or platform
1). To raise the platform or forks, pump foot pedal until platform reaches desired height.
2). To lower lift, press release pedal down. Pressure on
release pedal controls speed of descent of load.
S E C T I O N 5
MAINTENANCE
ROUTINE MAINTENANCE:
1). Grease wheels and casters at least once a month to maintain easy roll of lift.
2). Do not overload the lift. All foot operated Presto Manual Stackers have a maximum rated capacity
of 1000 lbs.
3). Use only hydraulic oil in the hydraulic system. NEVER USE HYDRAULIC BRAKE FLUID.
Table 1 – Hydraulic Oil Specifications
If the lift will be used at normal ambient temperatures, Presto Lifts supplies the unit with
Citgo A W 32 oil. This may be replaced by any other good quality oil with 150 SSU at 100°
F and rust and oxidation inhibitors and anti-wear properties.
If the lift will be used at ambient temperatures below 0°F, use aircraft hydraulic oil. Use
Type 15 aircraft hydraulic oil.
The following are equivalent to CITGO AW32:
TYPEMANUFACTURER
DTE 24 ............................. EXXON/MOBIL
NUTO H32........................ EXXON/MOBIL
AMOCO AW32.................. CHEVRON (AMOCO CO.)
CAUTION!
It is very important to keep the hydraulic oil free of dirt, dust, metal chips,
water, and other contamination. Most of the problems with hydraulic systems
1. Pump lift to above 12'' height and then prop platform or forks up to keep it in raised position.
2. Step on release pedal and push ram down by
hand until it reaches its lowest point.
3. Slip chain off pulley and remove pulley assembly.
4. T ake of f two bottom cap screws that hold cylinder in place and slide cylinder forward towards the
base legs of the lift. The cylinder can now easily
be removed.
To replace ram chevron set in hydraulic cylinder assembly:
1. Remove hydraulic cylinder from lift and remove
V ent Plug (Part No. M427) and Oil Level Plug (Part
No. 428) and drain oil from cylinder.
2. Clamp pump body in vise, unscrew top hex nut
and remove outer cylinder.
3. Remove inner cylinder from pump making sure
not to distort or mar cylinder. Note: Do not use
pipe wrench.
4. Remove ram and replace chevron set.
TROUBLESHOOTING
If lift does not rise to full height:
It probably requires oil. (Check with lift in down
position.) T o fill cylinder with oil, follow these instructions.
There are two pipe plugs in the cylinder, Part No.
M427 (Vent Plug) and part No. M428 (Oil Level
Plug). Remove both plugs.
Put a good grade of hydraulic jack oil in the cylinder through the top hole. When the oil reaches the
level of the bottom hole, replace both plugs. TOP
PLUG IS A BREATHER PLUG, BE SURE TO
REPLACE PLUGS IN THEIR PROPER PLACES.
If lift does not hold load, or tends to drift downward under a load:
Dirt particle may be obstructing seating of the
valve, allowing leakage.
If dirt particle is obstructing seating of the valve:
Open release valve by pressing down on release
pedal. At the same time, pump foot lever three or
four strokes. Do this three or four times. Then place
some weight on the platform or forks and pump
foot lever until platform reaches its full height.
Now, lower lift six inches to a foot at a time. This
should dislodge dirt and lift should work properly .
5. Push ram into inner cylinder -- chevron end last!
6. Reassemble and fill with clean hydraulic jack oil.
P/N M400-10 Pump Body Complete includes all items below.
P/N M400-30 Pump Plunger Assembly includes items 13 thru 21.
P/N M400-50 Release Pin Assembly includes items 22 thru 24.
See pages 7 & 8 for availability of individual items.
ITEMPARTQTYDESCRIPTION
NO.NO.
1M4101Pump Body
2M4201Reservoir Seal O Ring
3M4122Pump Check Ball
4M416A1Poppet
5M4171Release Spring
6M4142Gasket
7M4191Release Bolt
8M4391Pump Intake Ball
9M4381Pump Intake Spring
10M4151Pump Valve Bolt
11M4131Pump Check Spring
12M4111Plug
13M4431Gasket
14M4441Plunger Sleeve
ITEM PARTQTYDESCRIPTION
NO.NO.
15M4451Plunger O Ring
16M4461Plunger Nut
17M4471Washer
18M4481Plunger Cup
19M407A1Plunger Guide Brg.
20M407B1Seal O Ring
2104571Pump Plunger
22M4421Release Pin
23M4401Release Pin O Ring
24M4411Release Pin
See pages 7 & 8 for availability of individual items.
ITEM #P/NQTYDESCRIPTION
1M4431Gasket
2M4441Plunger Sleeve
3M4451Plunger O Ring
4M4461Plunger Nut
5M4471Washer
6M4481Plunger Cup
7M407A1Plunger Guide Bearing
8M407B1Seal O Ring
904571Pump Plunger
1M432-01Plate, Ram Guide Bearing1
2M433-01Seal, Deep Z1
3M434Washer, Ram1
4M435Nut, Ram Cup1
5M424O Ring, Ram Seal, 813 ID x 1.061
6M420Reservoir Seal O Ring1
See pages 7 & 8 for availability of individual items.
When purchasing any M400-xx series cylinder make sure to purchase the breather plug, p/n M427, also.
All M400-xx series cylinders need to have the NPT shipping plug removed from the top hole after being
installed in the lift, and replaced with the NPT breather plug (p/n M427). If this step is not completed,
the cylinder will not operate properly.
Presto Lift, Inc.’s goal is for you to be satisfied with your order. Merchandise may
be returned, but returns will be subject to a restocking fee to cover the costs Presto
Lift, Inc. incurs which include but are not limited to handling, storage of the units,
etc. Presto Lift, Inc. will issue refurbishing costs where end-user wear is apparent.
W e would prefer to not charge for these costs but find it necessary and apologize for
any inconvenience. Please review the RETURN MA TERIALS AUTHORIZATION
(RMA) PROCEDURES.
LIFTS
Lifts may be returned with a restocking fee according to the following schedule:
1. Standard unit or standard unit with stock options:
Three or less20%
With re-order15%Four or more of the same model30%
With re-order20%
2. Custom engineered/modified lifts:No Returns
PARTS
Standard parts may be returned with a 20% restocking fee or $35.00 net, whichever
is greater. Modified or custom-engineered parts are not returnable. Unfortunately,
due to potentially concealed damage, all sales of electrical assemblies are final.
QUALITY ISSUES
Should you feel there is a quality problem, please contact the seller to ask questions
and gather information on how to rectify the issue. Presto Lift Inc. reserves the
right to determine potential credits, as a result of factory defects, based on its inspection of the merchandise.
GENERAL
All products shipped from our factory have passed Quality Assurance inspection
and testing. The carrier of choice has signed for, and accepted the product in new
working condition. The customer should inspect to ensure it is not received damaged, has no concealed damage or is not incomplete. Parts orders are determined to
be complete based upon Presto Lift, Inc. inspection sheets and carrier shipping
weights.
Although Presto Lift, Inc. is not legally obligated to issue a credit for any merchandise, the
RETURN MATERIALS AUTHORIZATION (RMA) PROCEDURE is provided as a courtesy to our customers in the event they do not receive what they wanted.
If a customer wishes to return a Presto Lift, Inc. product, the first step in the process is to
request an RMA number from Presto Lift, Inc.’s Customer Service Department. This request
must be made on or before the thirtieth (30th) calendar day following the date of Presto Lift,
Inc.’s invoice for the merchandise being returned.
The RMA number must appear on the outside of any packaging material for a return to be
accepted and processed by Presto Lift, Inc. Customers shipping returns back to Presto Lift,
Inc. from the Continental US, Canada and Mexico have fourteen (14) days from the effective
date of the RMA to have the merchandise arrive freight prepaid at Presto Lift, Inc. Returns
from locations other than the Continental US, Canada and Mexico must be shipped within the
fourteen (14) day period to arrive Free On Board (FOB) at Presto Lift Inc as soon as practical.
If a customer believes Presto Lift, Inc.’s merchandise is defective, freight will be reimbursed
to the original “Bill To” on the invoice if Presto Lift Inc. finds that the merchandise is defective.
Please remember that merchandise with RMAs coming back to Presto Lift Inc. from the Continental US, Canada and Mexico will not be accepted by Presto Lift Inc. if the returned goods
do not arrive freight prepaid at Presto Lift Inc. within the fourteen (14) day effective period.
All credits issued are less restocking fees as applicable, plus any assessed outbound/inbound
in-transit damages.
Return addresses: please refer to your RMA for the address to which your product should be
returned.
Presto Lifts has carefully chosen the components in your unit to be the best available for the purpose.
Replacement parts should be identical to the original equipment. Presto Lifts will not be responsible for
equipment failures resulting from the use of incorrect replacement parts or from unauthorized modifications to
the unit.
Presto Lifts can supply all replacement parts for your lift. With your order, please include the model number
and the serial number of the unit. You can find these numbers on the name plate. This plate is located on the
angle support at the top of the cylinder.
T o order replacement parts, please call the Presto Parts Department. Parts are shipped subject to the following
terms:
• FOB factory
• Returns only with the approval of our Parts Department.
• Credit cards preferred (except parts covered by warranty).
• Freight collect for truck (except parts covered by warranty).
• Freight prepaid and invoice for small parcel shipments (except parts covered by warranty).
Parts replaced under warranty are on a “charge-credit” basis. We will invoice you when we ship the replacement
part, then credit you when you return the worn or damaged part.
Presto Lifts warrants all of its products against defects in the welded structural frame and, if
applicable, scissor legs from faulty material and workmanship for a period of five (5) years from
the date of invoice.
A lifetime limited warranty is provided for the Airstroke ActuatorTM in all pneumatic lifts against
any defect due to faulty material or workmanship.
All batteries are covered under a separate limited warranty from the battery manufacturer for a
period of one year from the date of invoice.
All other components have a limited warranty against defects in faulty material and workmanship
for a two (2) year period from the date of invoice date of invoice and 30 day limited warranty on
labor. Please note that prior authorization from Presto Lifts is required on all warranty work.
There are no implied warranties of any kind, more specifically, there are no warranties of merchantability or fitness for any particular purpose. Presto Lifts' sole warranty shall be as set forth in
this limited warranty.
Presto Lifts will elect to repair or replace a defective component without charge, if any components should become defective within the limited warranty period. Proof of purchase is required
for warranty. The charge for shipping the defective component is the responsibility of the buyer
and must be accompanied with an RGA number. The shipping charge to return the component to
the buyer is the responsibility of Presto Lifts, Inc.
This limited warranty does not cover labor expense for removal or reinstallation of components
after thirty days. This limited warranty shall not cover, among other things: damages resulting
from foreign matter or water, failure to provide reasonable and necessary maintenance, and if
applicable, use of product while charger is plugged into an AC outlet, or failure to follow operating instructions. The limited warranty is not valid for damage resulting from negligence, accident, unreasonable use, abuse or misuse, exceeding data plate capacities or altering the product
without Presto Lifts authorization.
Presto Lifts expressly disclaims and excludes any liability for consequential, incidental, indirect
or punitive damages or financial loss to people or property resulting from any breach of warranty
or the operation or failure of this product.
Presto Lifts makes no representation that this product complies with local, state, or federal safety/
product standards codes. Should this product fail to comply in any way with those codes, it shall
not be considered a defect of materials or workmanship. Presto Lifts shall not be held liable for
any damages resulting from noncompliance. It is the dealer's responsibility to exercise this limited warranty . This limited warranty is provided to the original purchaser (defined as the original
end user) and is nontransferable. This constitutes the complete and final agreement involving
Presto Lifts and limited warranty obligations for products.