Table of Contents
Troubleshooting
Related Manuals for Presto P4
Summary of Contents for Presto P4
- Page 1 Level Loader Model Number ___________________ Serial # _________________________ Date Placed in Service _____________ IMPORTANT: READ CAREFULLY BEFORE INSTALLING OR OPERATING LIFT Part orders are subject to a $50 miminum charge May 2006...
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Page 2: Introduction
This manual contains instructions on the safe and proper installation, use, and maintenance of a P4 Level Loader. Please be sure that this manual is available to anyone who uses or services the P4 unit. Be sure that everyone who uses the P4 unit has read this manual. -
Page 3: Table Of Contents
Parts identification — Front view ..............12 Fig. 7. Parts identification — Rear view ..............13 Fig. 8. Hydraulic pump ..................... 13 Fig. 9. Down valve ....................14 Fig. 10 Hydraulic oil specifications ................16 PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 4: Safety
SAFETY The safety of all persons installing, using, servicing, or working near the P4 Level Loader unit is of paramount concern to Presto. The P4 Level Loader unit is a powerful machine with moving parts, and is CAPABLE OF CAUSING PERSONAL INJURY IF PROPER PRECAUTIONS ARE NOT TAKEN. -
Page 5: Electrical Connections
AC. This voltage can kill you. 5. Move the unit into position, supporting the Don’t work with the electrical parts platform of the unit. Place the unit on a firm, unless you are a qualified electrician. level surface. PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 6: Testing
Do not try to adjust the which might get in the way of the unit as it relief valve. If you change the setting raises or lowers. PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 7: Operating Instructions
Volts AC. This voltage can kill you. preventing the platform of the unit DON’T WORK WITH from moving down. This is designed ELECTRICAL PARTS UNLESS YOU to prevent the unit from lowering ARE A QUALIFIED ELECTRICIAN! PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 8: Loading The Unit
• Don’t try to lift a load that exceeds Before raising the platform, be sure all the maximum rating. If you do not workers are clear of the unit. follow these rules, the unit may fail Fig. 4 Electrical diagram PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 9: Lowering The Platform
Down to Lowering the Platform lower it. If the unit does not operate right away, unplug the power cord and call a 1. Press the Down button to lower the platform. qualified maintenance worker. PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 10: Maintenance And Troubleshooting
Volts AC. This voltage can kill you. way down. DON’T WORK ON THE ELECTRICAL PARTS UNLESS YOU ARE A • The warning labels have been QUALIFIED ELECTRICIAN! included for the safety of the PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 11: Routine Periodic Maintenance
• Check all of the hydraulic fittings and hoses, and tighten the connections if necessary. PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 12: Troubleshooting Check List
The relief valve CAUTION! is set to relieve this pressure before If the platform will not raise, do not it becomes too great. The relief continue to hold the Up button for PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 13: Fig. 7. Parts Identification - Rear View
Retainer ring Relief valve adjusting screw Down valve solenoid Outer spring Check valve cap Inner spring O-ring Relief valve poppet Check valve spring Coupling – pump to motor Check valve ball Gasket Fig. 8 Pump PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 14: Fig. 9. Down Valve
The valve must unit, near the floor level. There may be be clean and free to operate. To check this, something blocking the beam of the photo remove the solenoid and then the valve. Look PRESTO P4 LEVEL LOADER OWNER’S MANUAL... -
Page 15: Repacking The Cylinder
Repacking the Cylinder be the same on each side of the mechanism. The lift in the P4 Level Loader unit may use several different types of cylinders. To order a 5. When the tension is correct, tighten the lock repacking kit and receive repacking instructions, nuts. -
Page 16: Ordering Replacement Parts
Ordering Replacement Parts 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. - Page 17 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 refur- bishing costs where end-user wear is apparent.
- Page 18 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.
- Page 19 PRESTO P4 LEVEL LOADER OWNER’S MANUAL...
- Page 20 Presto Lifts is required on all warranty work. There are no implied warranties of any kind, more specifically, there are no warranties of mer- chantability or fitness for any particular purpose. Presto Lifts' sole warranty shall be as set forth in this limited warranty.
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