SERVICE MANUAL / PARTS LIST
Contents
1. System relief pressure is set too low Internal leakage in cylinder Incorrect clamp pad size or load not fully engaged in clamp arms Pad camber is set incorrectly Load too heavy for clamp capacity Load may not by stacked correctly or may need to be unitized Bent arms or contact pads SOLUTIONS Tighten all cartridges to torque values shown on page 8 See Adjusting System Pressure on page 9 Replace Cylinder seals If tube piston or rod is scored replace with new parts Be sure the clamp pads are correctly sized for the load and the load is positioned fully in the clamp arms Shim pads to change camber Consult factory Re stack or unitize load shrink wrap Consult factory CRUSHING LOADS POSSIBLE CAUSES System relief pressure is set too high Operator over working milking control valve Bent arms or contact pads Pad camber is set incorrectly Variable loads that require different clamping pressures 11 SOLUTIONS See Adjusting System Pressure page 9 Once the pad contacts the load clamp the load in one even motion do not over work the valve Consult factory Shim pads to change the camber Install a 4 position pressure regulator on truck cowl consult factory for part number and availability2. SPHERICAL SEAT SPHERICAL BEARING COTTER PIN SOCKET HEAD BOLT ESNA NUT PAD SUPPORT HEX HEAD BOLT SPRING WASHER HOOK LOWER BAR 50 DIA X 5 3 C1018 BALL LOCK PIN SOCKET HEAD BOLT HI COLLAR LOCK WASHER SLIDE BUTTON BUTTON HEAD BOLT LOCK WASHER BUTTON HEAD BOLT LOCK WASHER CYLINDER WASHER SHIM O RING MOUNTING LUG SOCKET HEAD BOLT LOCK WASHER PLATE ASSEMBLY KIT NOT SHOWN ON OO KR CO co CQ nm NY m NY NY NYO NY HBS NY F A ser f 2 A N O O DAN O oO WO N DO A CQ PE a CLAMP ASSEMBLY 1 L35A CLAMPS QTY PART 4 DESCRIPTION CONSULT FACTORY FRAME CONSULT FACTORY PAD CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY 110730 110731 11G 08136 17D 08 CONSULT FACTORY 10 0820 108088 4 4 4 100574 86 4 4 8 8 2 101098 2 100077 3 2 100572 060 2 11G 0612 2 16E 06 8 106041 2 25G 0612 2 4E 06 8 25G 0524 8 4E 08 4 100047 CONSULT FACTORY 4 100029 314 1 111959 2 11G 0820 2 16E 08 4 111867 RIGHT HAND ARM LEFT HAND ARM CYLINDER ASSEMBLY LOAD BACKREST FRONT COVER PLASTIC SLIDE FLAT SIDE SPHERICAL SEAT SPHERICAL BEARING COTTER PIN SOCKET HEAD BOLT ESNA NUT PAD SUPPORT HEX HEAD BOLT SPRING WASHER HOOK LOWER BAR 50 DIA X 5 3 C1018 BALL LOCK PIN SOCKET HEAD BOLT HI COLLAR LOCK WASHER SLIDE BUTTON BUTTON HEAD BOLT LOCK WASHER BUTTON HEAD BOLT L
3. ACE CAP PRIOR TO PRESSURIZING SYSTEM TURN ADJUSTMENT COUNTERCLOCKWISE TO DECREASE PRESSURE CLOCKWISE TO INCREASE PRESSURE DO NOT EXCEED 2000 PSI 136 BAR ADJUSTING SYSTEM PRESSURE Release system pressure prior to servicing valve by turning the truck off and working the side shift and clamp function controls several times Prior to adjusting system pressure disconnect the hoses from the clamp valve at the open and close ports Install a separate in line tee with a short hose and a pressure gauge that is calibrated to 5000 psi 340 bar in each port two required Reconnect hoses Measure system pressure by securely clamping a load or close the clamp arms all the way and hold the control and hold the control lever in the closed clamped position The actual clamping pressure is the difference between the pressure shown on the gauge in the open port subtracted from the pressure shown on the close port gauge Release system pressure see step 1 Remove cap on bidirectional valve refer to page 8 and adjust cartridge no more than one quarter turn Replace cap prior to pressurizing system Repeat until desired pressure setting is achieved Do not exceed 2000 psi 136 bar clamping pressure ADJUSTING BY PASS PRESSURE If one arm bottoms out and the other moves more then 3 76mm before opening fully increase by pass relief pressure If one arm bottoms out and the other does not open fully decrease by pass pressure To ad
4. LORON EXCELLENCE IN ACTION SERVICE MANUAL PARTS LIST CARTON CLAMP L35A amp L20A CONTENTS PAGE 1 Lift Truck Requirements General Installation Procedures General Inspection 2 4 Clamp Assembly 5 6 Hydraulic Assembly 7 Clamp Cylinder Assembly 8 Clamp Valve Assembly 9 Adjusting Relief Pressure 10 Arm Slide amp Shim Replacement 11 Troubleshooting Guide 425 Hazel St Kelso WA 98626 800 248 6079 Fax 360 578 9934 LIFT TRUCK REQUIREMENTS CAPACITY CLAMP HYDRAULICS Capacity shown on the clamp s name plate is for the clamp only The combined truck and clamp capacity is provided by the lift truck manufacturer Recommended Truck Pressure 1700 PSI 142 to 170 bar Oil volume 6 10 GPM 22 5 to 38 l min Hydraulic fluid petroleum based hydraulic fluid only Hydraulic supply group includes hoses and take up one set for each function Auxiliary valve 2 Function Side Shift amp Clamp a double auxiliary valve GENERAL INSTALLATION PROCEDURES 1 Make sure the attachment s centering lug is completely seated in truck carriage center notch 2 Clearance between the lower retainers that hold the attachment to the truck s lower carriage bar should be as shown below ir 13 3 2mm MAXIMUM TRUCK LOWER CARRIAGE BAR LOWER RETAINER 3 Attach truck s supply group take up to the clamp s valve on attachment s base 4 While standing clear of the clamp attachment cycle the attachment in a
5. OCK WASHER CYLINDER WASHER SHIM O RING MOUNTING LUG SOCKET HEAD BOLT LOCK WASHER SLIDE BUTTON Note Older Attachments may require different parts then shown consult with factory for Attachments 2009 or older CLAMP ASSEMBLY 2 1 8 SEE ARM SLIDE amp SHIM REPLACEMENT PAGE CLAMP ASSEMBLY 3 Joi v AN DOO KF C a N QTY m 1 2 4 4 2 2 HYDRAULIC ASSEMBLY L20A CLAMPS PART CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY 100676 05 25G 0516 100011 103084 4E 05 100095 05 100254 05 2F 05 101419 05 DESCRIPTION HOSE ASSEMBLY HOSE ASSEMBLY HOSE ASSEMBLY HOSE ASSEMBLY STRIAGHT THREAD ADAPTER FITTING BUTTON HEAD BOLT CLAMP VALVE W FLOW DIVIDER VALVE MOUNTING BAR WELDMENT LOCK WASHER 90 O RING 45 O RING ELBOW PLAIN WASHER HOLLOW HEX PLUG NOTE USED ON NON SIDE SHIFT ONLY NC3 9 C2 C1 on 5 59 Org Re AN o a HYDRAULIC ASSEMBLY L35A CLAMPS QTY PART DESCRIPTION 1 CONSULT FACTORY HOSE ASSEMBLY 1 CONSULT FACTORY HOSE ASSEMBLY 1 CONSULT FACTORY HOSE ASSEMBLY 1 CONSULT FACTORY HOSE ASSEMBLY AS 1 101423 MOUNTING PLATE ZOT 1 100011 VALVE SIDE SHIFTING 2 2 25 0516 NYLOCK BUTTON HEAD BOLT 4 100095 05 90 O RING FITTING 8 100676 05 STRIAGHT THREAD O RING ADAPTER 2 101419 05 HOLLO
6. W HEX PLUG NOTE USED ON NON SIDE SHIFT ONLY LII i T m 4 L eo 7 H BAA mi c4 C3 C2 C1 1 OA H 8 AS VEIWED FROM DRIVERS SEAT ON Oo CO LE L a A WO o CYLINDER ASSEMBLY VLLLLLLLLLLLLL LLL LLL LLL LLL CLEARANCE NOTE CYLINDER 03 06 AT EACH CYLINDER END ADJUST SLOTTED NUT TO ALLOW FOR CLEARANCE THAT IS SHOWN INSERT COTTER PIN AFTER ADJUSTMENT L35A CLAMPS L20A CLAMPS QTY PART DESCRIPTION QTY PART DESCRIPTION 1 CONSULT FACTORY CYLINDER ASSEMBLY 1 CONSULT FACTORY CYLINDER ASSEMBLY 1 CONSULT FACTORY TUBE CONSULT FACTORY TUBE a 1 CONSULT FACTORY ROD 2 1 CONSULT FACTORY ROD 1 100021 PISTON 3 1 101256 PISTON 1 100020 GLAND 4 1 101254 GLAND 1 101036 SEAL KIT NOT SHOWN 5 1 101261 SEAL KIT NOT SHOWN 1 101035 MODIFIED ESNA NUT 6 1 101035 MODIFIED ESNA NUT 1 100032 107 POLY PAK LSP 7 1 100032 095 POLY PAK LSP 1 100031 059 POLY PAK LSP 8 1 100031 059 POLY PAK LSP 1 100028 316 BACK UP O RING 9 1 100028 314 BACK UP O RING 1 100029 316 O RING LSP 10 1 100029314 O RING LSP 1 100033 WEAR RING LSP 11 1 101260 WEAR RING LSP 1 101034 6 WIPER LSP 12 1 101034 6 WIPER LSP 1 100027 1 LOCKWIRE 13 1 1000272 LOCKWIRE 1 100029 203 O RING LSP 14 1 100029 203 O RING LSP 1 CONSULT FACTORY SPACER 15 1 CONSULT FACTORY SPACER CYLINDER SERVICE e Prior to assembly lubricate seals cylinde
7. just by pass relief pressure release system pressure prior to servicing valve by turning the truck off and working the side shift and clamp function control several times Remove cap on bidirectional valve item 1 on side shifting valve and adjust cartridge no more than one quarter turn Replace cap prior to pressurizing system Repeat until desired pressure setting is achived Do not exceed 2000 psi 136 bar ARM SLIDE amp SHIM REPLACEMENT To replace the slides extend the arms to the fully open position Release system pressure prior to removing the arms by turning the truck off and working the side shift and clamp function controls several times Support the arm with an overhead crane or lift truck Be sure to secure the chain or sling in a manner that prevents the arm from falling out of the chain or sling when hanging free of the clamp frame Remove the cotter pin slotted nut and spherical bearing from the end of the clamp cylinder rod Keeping hands and feet clear carefully slide the clamp arm off of the clamp frame Install the arm on the clamp frame ensuring that the arm moves freely without excessive binding If the arm is too loose or too tight add or remove shims as required Once the clearance is satisfactory insert the cylinder rod into the cylinder anchor on the arm Install the spherical bearing nut and cotter pin onto the cylinder rod end Be sure to leave 03 06 7mm to 1 5mm clearance to allow the cylinder to fl
8. nd out several times Use caution because partially filled hydraulic lines may cause erratic movement GENERAL INSPECTION AND MAINTENANCE 1 Check all hydraulic fittings hoses cylinders and valves for leakage Repair or replace as required 2 Check hoses for pinch points and signs of wear Replace worn hoses with LORON hose or Parker Parflex 560 wire reinforced hose only 3 All bolts should be checked and tightened as required 4 Check lower retainer clearance referenced to item 2 in General Installation Procedures above A shim may be tack welded to the bottom of the lower retainers to tighten the clearance if necessary m m m NY NY Fe Ft FTF FF 2 O O AN O CQ Na O a amp WO a C A OO L20A CLAMPS QTY PART DESCRIPTION CONSULT FACTORY FRAME CONSULT FACTORY PAD CONSULT FACTORY RIGHT HAND ARM CONSULT FACTORY LEFT HAND ARM CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY CONSULT FACTORY 110730 110731 11G 08136 17D 08 CONSULT FACTORY CONSULT FACTORY 108088 4 4 4 100574 86 4 4 101098 100077 3 100572 060 11G 0612 16E 06 N wp N m m9 NY 111619 25G 0612 4E 06 CONSULT FACTORY 8 4E 08 4 100047 CONSULT FACTORY 4 100029 314 1 112444 2 116 0820 2 16E 08 CONSULT FACTORY CYLINDER ASSEMBLY LOAD BACKREST FRONT COVER PLASTIC SLIDE FLAT SIDE
9. oat on it s mountings see page 7 Remove the cotter pin slotted nut and spherical bearing from the end of the clamp cylinder rod Keeping hands and feet clear carefully slide the clamp arm off of the clamp frame BLOCK FOR L20 CLAMP MODELS 2 X2 X3 LONG 50 8mm X 50 8 mm X 76mm FOR L35 CLAMP MODELS 2 25 X 2 25 X 3 LONG 57 2mm X 57 2mm X 76mm ARM CLAMP FRAME ARM BAR Inspect slides and slide buttons for wear Slides may be rotated end for end and re used if excessively worn on the outer end only Extra shims may be used to tighten operating clearance on slightly worn slides Replace any slides worn to less than 06 1 5mm thick or any slide that is deeply scored or broken To aid in replacing the slides a block may be fashioned of wood or another convenient material to the dimensions shown above The block is inserted in the end of the arm to hold the slides shims and buttons in position while the arm is inserted over the arm bars on the clamp frame The block is expelled out the opposite end of the arm as the arm is pushed onto the frame Prior to installing the arm the block may be used to determine the number of shims to place under the slides Adjust the clearance between the slides and the block to provide approximately 06 1 5mm running clearance between the slides and arm when installed TROUBLE SHOOTING GUIDE LOADS SLIPPING OR DROPPING POSSIBLE CAUSES Valve cartridges are not sufficiently tight
10. r bore and rod with STP e Inspect all parts for scratches nicks and gouges Replace all damaged components e Inspect cylinder bore and rod for scoring Replace if scored e Avoid damage to seal grooves Use a dull screwdriver for seal removal e Torque piston nut to 200 FT LBS 7 CLAMP CONTROL VALVE c Nr ea ice J AS E mn DP jk P 6 103813 FLOW DIVIDER TORQUE 10 12 FT LBS 104711 SEAL KIT 104721 103815 BIDIRECTIONAL RELIEF TORQUE TO 35 40 FT LBS 104716 SEAL KIT 101419 03 4 SAE O RING PLUGS 103814 P O CHECK 103815 1 BIDIRECTIONAL RELIEF TORQUE 35 40 FT LBS SEE103815 ABOVE FOR SEAL KIT AND TORQUE NOTE 104715 SEAL KIT NOTE 1 Lubricate threads amp seals prior to assembly 2 For Valve pressure changes See page 9 3 Side Shifting Ports plugged for Non Side Shifting HYDRAULIC SCHEMATIC 100011 SIDE SHIFTING VALVE ASSEMBLY Includes all cartridges amp plugs QTY PART DESCRIPTION 1 103815 RELIEF CARTRIDGE 1 103813 FLOW DIVIDER COMBINER 3 103814 P O CHECK CARTRIDGES F 103813 1 103815 1 RELIEF CARTRIDGE 104721 14 101419 03 4 SAE O RING PLUG LSP 1 104721 ORIFICE 103815 1 1700PSI ADJUSTING RELIEF PRESSURE WARNING RELEASE TRUCK PRESSURE PRIOR TO SERVICING VALVE BY TURNING THE TRUCK OFF AND WORKING THE SIDE SHIFT AND CLAMP FUNCTION CONTROLS 72 edd A E REMOVE CAP REPL
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