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48520 Pruner

SERVICE MANUAL

99912961 REV 13

© 2013 Greenlee Textron Inc.

4/13

Serial Codes FPK and FRK

Read

and

understand

all of the instructions and

safety information in this manual before operating

or servicing this tool.

Register this product at www.greenlee.com

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Summary of Contents for 48520

Page 1: ...12961 REV 13 2013 Greenlee Textron Inc 4 13 Serial Codes FPK and FRK Read and understand all of the instructions and safety information in this manual before operating or servicing this tool Register this product at www greenlee com ...

Page 2: ...safe practices related to the use of this tool Observe all of the safety information provided Purpose of this Manual This manual is intended to familiarize personnel with the safe service procedures for the following Greenlee Utility tools 48520 Open Center Hydraulic Pruners Serial Codes FRK and FPK Keep this manual available to all personnel Replacement manuals are available upon request at no ch...

Page 3: ...are listed under Other Publications Operation Manual Specifications and Parts Manual Failure to observe this warning could result in severe injury or death Electrical shock hazard When using this tool near energized electrical lines use only certified nonconductive hoses and proper personal protective equipment Keep fiberglass extension clean and dry when working around energized electrical lines ...

Page 4: ...hydraulic fluid can cause serious burns Do not reverse hydraulic flow Operation with hydraulic flow reversed can cause tool malfunction Connect the pressure supply hose and tank return hose to the proper ports Failure to observe this warning could result in severe injury or death Inspect hydraulic hoses and couplings every operating day Repair or replace if leakage crack ing wear or damage is evid...

Page 5: ... grease dirt and foreign material If the fiberglass extension cannot be wiped clean use any approved fiberglass cleaning products Do not use solvents or gasoline to clean the fiberglass extension 2 Inspect the cutter unit Check for wear at the pivot ing and sliding surfaces Repair blades with nicks or gouges with a very fine file and a pocket whet stone Remove and destroy any cutter blade with sev...

Page 6: ...must be removed from all parts of the blade Do not sharpen the blade to a thin razor edge This reduces the strength and shortens the service life of the blade Do not overuse the file It is not advisable to remove large amounts of metal from the blade 4 After the contoured side of the blade has been sharpened turn it over so that the flat side is facing up Dress the blade with a whetstone just enou...

Page 7: ...he type of hydraulic system required Verify the power source hydraulic system 2 Verify that the pressure and return hoses are connected properly to the tool and power source ports 3 Power source reservoir must be filled to FULL mark with hydraulic fluid 4 Start the power source All power source shut off devices must be engaged or opened clutch engaged separate ON OFF valves open etc 5 After verify...

Page 8: ...amage or loose clamps Tighten clamps or replace components if necessary Fill reservoir Tool components sticking or binding Check for dirt or gummy deposits Clean components Check for worn or damaged components Replace components Dirt contaminants etc in tool components Disassemble tool and clean components Tool operates slowly Power source components not adjusted correctly Refer to power source op...

Page 9: ...ged components Tool control valve sticks or works hard Check for dirt or gummy deposits Clean components Misalignment or binding of control linkage Correct alignment Lubricate linkage joints Replace damaged components Valve components worn or damaged Disassemble valve and replace worn or damaged components Tool operates backwards Hydraulic flow reversed to tool Reverse flow to tool Check for valve...

Page 10: ...ents slowly The disassembly procedure is divided into sections of the tool Disassemble only the section s necessary to complete the repair Disassemble the tool on a flat clean surface Take care not to lose or damage any parts that may fall free during disassembly Inspect all parts as they are disassembled and mating parts in tool that are not removed for signs of damage wear cracks etc Replace any...

Page 11: ...r 5 Remove spool 3 Inspection 1 Cutter Blade 53 Cutting surface must be smooth and free of grooves nicks or gouges If blade has minor grooves nicks or gouges remove them and sharpen blade with a file or the pocket whetstone provided with tool If blade has severe damage replace the blade Both holes in blade are pivot holes If either hole is out of round replace blade 2 Cutter Hook 52 The surface of...

Page 12: ...ndle 1 3 Position trigger 9 on valve handle 1 aligning holes in each component Install trigger pivot pin 10 and secure in place with two external retaining rings 11 4 Position trigger guard 12 on handle 1 and secure with round slotted head cap screws 14 and internal tooth lock washers 13 On later model pruners use two button head screws to secure one end guard to the handle 5 Install O ring 15 ont...

Page 13: ...e outside diameter of the piston until it is in the groove Note Overstretching will break the seal 18 The piston seal will be stretched out of shape when installed in the groove Place the piston with the seal installed on a clean flat surface and roll it back and forth to reshape the seal 19 Use a sizing tube fixture to compress and form the seal back to the original shape The dimensions for this ...

Page 14: ...efer to Closure Adjustment in the Maintenance section of this manual Cutter Head 1 Screw cutter mount 47 in end of outer extension tube 45 2 Fasten cutter hook 52 and cutter brace 55 to opposing sides of cutter mount 47 with hex head cap screws 62 and lock washers 61 3 Position cutter blade 53 and washer 54 between cutter hook 52 and cutter brace 55 Secure cutter blade 53 with hex head shoulder bo...

Page 15: ...Rockford IL 61109 2988 USA 815 397 7070 15 Illustration Serial Code FRK 69 13 14 58 57 56 55 54 53 52 51 63 48 61 62 61 59 60 49 50 47 19 64 67 41 68 27 66 65 15 28 30 29 31 32 18 17 16 18 22 21 20 26 43 44 46 45 70 15 1 11 10 9 6 5 4 3 12 6 8 7 2 51 42 23 ...

Page 16: ...her filter 1 29 Support rod seal 1 30 Seal rod 1 31 Retainer seal 1 32 42841 50428411 Retaining ring 1 41 42506 50425062 Bushing 1 42 48183 50481835 Extension rod assembly 1 43 42405 50424052 Pin 218 x 562 1 44 42442 50424422 Retainer sleeve 1 45 48167 50481673 Tube 1 46 O ring 562 x 750 x 093 70 1 47 48172 50481720 Mount assembly 1 48 42406 50424062 Connecting link 1 49 41149 50411492 Bolt 5 16 2...

Page 17: ...ockford IL 61109 2988 USA 815 397 7070 17 Illustration Serial Code FPK 58 57 56 55 54 53 52 51 63 48 61 62 61 59 60 49 50 47 19 64 67 65 41 68 27 15 28 30 29 31 32 18 17 16 18 22 21 20 26 43 44 46 45 69 15 1 11 10 9 6 5 4 3 12 13 14 13 14 6 8 7 2 51 42 23 66 ...

Page 18: ...rod pin 1 44 42442 50424422 Retainer sleeve 1 45 48167 50481673 Tube assembly 1 46 O ring 9 16 x 3 4 x 3 32 1 47 48172 50481720 Cutter mount assembly 1 48 42406 50424062 Connecting link 1 49 41149 50411492 Bolt 1 50 42401 50424013 Connecting link guide roller 1 51 41367 50413671 Hex lock nut 2 52 48197 50481975 Cutter hook 1 53 42508 50425081 Cutter blade 1 54 40001 50400015 Washer 1 55 42510 5042...

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