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Warning

Install, use and maintain this equipment according to Corken, Inc. instructions and all applicable federal, state, local 
laws and codes, and NFPA Pamphlet 58 for LP-Gas or ANSI K61.1-1989 for Anhydrous Ammonia. Periodic inspection 
and maintenance is essential.

Corken One Year Limited Warranty

Corken,  Inc. warrants that its products will be free from defects in material and workmanship for a period of 12 
months following date of purchase from Corken. Corken products which fail within the warranty period due to defects 
in material or workmanship will be repaired or replaced at Corken’s option, when returned freight prepaid to: Corken, 
Inc., 9201 North I-35 Service Road, Oklahoma City, OK. 73131.

Parts subject to wear or abuse, such as mechanical seals, blades, piston rings, valves, and packing, and other 
parts showing signs of abuse are not covered by this limited warranty. Also, equipment, parts and accessories not 
manufactured by Corken but furnished with Corken products are not covered by this limited warranty and purchaser 
must look to the original manufacturer’s warranty, if any. This limited warranty is void if the Corken product has been 
altered or repaired without the consent of Corken.

ALL IMPLIED WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS 
FOR A PARTICULAR PURPOSE, ARE EXPRESSLY NEGATED TO THE EXTENT PERMITTED BY LAW AND 
SHALL IN NO EVENT EXTEND BEYOND THE EXPRESSED WARRANTY PERIOD.

Corken disclaims any liability for consequential damages due to breach of any written or implied warranty on Corken 
products. Transfer of toxic, dangerous, flammable or explosive substances using Corken products is at the user’s 
risk. Such substances should be handled by 

experienced, trained personnel in compliance with governmental 

and industrial safety standards.

Contacting The Factory

For your convenience, the model number and serial number are given on the compressor nameplate. Space is 
provided below for you to keep a written record of this information.

Always include the model number and serial number when ordering parts.

Model No. 
Serial No.
Date Purchased 
Date Installed
Purchased From 
Installed By

2

Summary of Contents for WFD551

Page 1: ...nstructions applicable laws and safety standards such as NFPA Pamphlet 58 for LP Gas and ANSI K61 1 1972 for Anhydrous Ammonia 4 Transfer of toxic dangerous flammable or explosive substances using Cor...

Page 2: ...ucts are not covered by this limited warranty and purchaser must look to the original manufacturer s warranty if any This limited warranty is void if the Corken product has been altered or repaired wi...

Page 3: ...nment 10 2 3 Crankcase Oil Pressure Adjustment 11 2 4 Startup Check List 11 CHAPTER 3 ROUTINE MAINTENANCE CHART 12 CHAPTER 4 ROUTINE SERVICE AND REPAIR PROCEDURES 13 4 1 Valves 13 4 1 1 Reverse Unload...

Page 4: ...shock endurance Self lubricating PTFE piston rings Corken provides a variety of state of the art piston ring designs to provide the most cost effective operation of compressors for non lube service Th...

Page 5: ...After leveling and bolting down the baseplate the volume beneath the channel iron baseplate can be grouted to prevent flexing of the top portion of the baseplate and the J bolt that extends beyond th...

Page 6: ...wheel Humid climates can cause problems with explosion proof motors The normal breathing of the motor and alternating between being warm when running and cool when stopped can cause moist air to be dr...

Page 7: ...details on specific packing configurations necessary for your application Moisture oil or condensate can be removed from the distance piece with the purge gas by using the lower distance piece connec...

Page 8: ...oil pressure falls below 12 psi due to oil pump failure or low oil level in crankcase The switch or the compressor controller must have a 30 second delay on startup which allows the compressor to buil...

Page 9: ...and gas flow D C B A Flywheel side Gas inlet first stage inlet Connected to intercooler outlet second stage inlet Connected to intercooler inlet first stage outlet Gas outlet second stage outlet Wate...

Page 10: ...verify that the cylinder bore and valve areas are free of rust and other debris For valve and or cylinder head removal instructions refer to chapter 4 of this IOM manual Drain the oil from the crankca...

Page 11: ...ef valve and adjustment screw Figure 2 3 Oil pressure adjustment 2 4 Startup Check List Please verify each item on this list below before starting your compressor Failure to do so may result in a cost...

Page 12: ...ccumulation points 3 Drain distance pieces Clean cooling surfaces on compressor and intercooler if any Lubricator supply tank level if any Check belts for correct tension Inspect valve assemblies Lubr...

Page 13: ...g and inspecting the valves begin by depressurizing and purging if necessary the unit Chapter 4 Routine Service and Repair Procedures Disassembly 1 Unscrew the valve cap or unloader if applicable asse...

Page 14: ...is in an unloaded condition see Figure 4 1 1 for details 4 2 Heads A compressor cylinder and head very seldom require replacement if the compressor is properly maintained The primary cause of damage t...

Page 15: ...turn at a time do not over tighten If the adjusting screw is tightened until the packing spring is solid the packing should be replaced If packing will not seal carefully inspect piston rods for possi...

Page 16: ...inder as necessary The pistons must not touch the cylinder wall 4 After the cylinder is properly aligned to the pistons tighten the bolts using the torque specification listed in Appendix B Start in t...

Page 17: ...asher and install retainer ring 4 Install packing installation cone part number 4005 over the threaded end of the piston rod 5 Before installing the packing box cartridge over the packing cone and pis...

Page 18: ...en remove the bearing carrier and crankshaft from the crankcase If corrosion or pitting is present the roller bearings should be replaced When replacing roller bearings always replace the entire beari...

Page 19: ...4 8 When you are sure the pin is properly aligned install the cover bolts finger tight If alignment is correct the pump cover will mount flush to the bearing carrier If it does not re check the pin a...

Page 20: ...al B Copper gasket material C Iron lead gasket material D Buna N A Charge option Charge option No charge option Standard Charge option Charge option Charge option Charge option Charge option Standard...

Page 21: ...iron ASTM A48 Class 30 2nd stage platform Ductile iron ASTM A536 Piston rod C1050 steel Nitrotec coated Chrome oxide coated Crosshead Ductile iron ASTM A536 Piston rings PTFE glass and moly filled All...

Page 22: ...11 6 19 7 maximum 825 RPM 24 0 40 8 Maximum working pressure psig bar g 1 000 68 9 Maximum brake horsepower kW 45 33 6 Maximum rod load lb kg 7 000 3175 Maximum outlet temperature F C 350 177 Approxim...

Page 23: ...e to reach its own level Pipe to drain or vent with a shut off valve Distance piece must be drained weekly to prevent an accumulation of oil or condensate Spring Spring 2 Highly toxic gases Pressurize...

Page 24: ...4 19 50 495 30 18 34 465 84 8 50 215 90 4 38 111 13 47 51 1 206 68 42 87 1 088 90 2 13 53 96 1 00 25 40 19 06 484 02 1 00 25 40 9 13 231 78 10 11 256 83 5 38 136 53 8 24 209 39 39 27 997 35 3 50 88 9...

Page 25: ...ng 1 2 NPT optional Use six 1 2 anchor bolts Electric motor driver Pipe tap Adjustable driver slide base Crankcase heater optional Gas inlet 1 600 lb R F ANSI flange Connect to intercooler outlet 1 60...

Page 26: ...t factory 6 Compression ratio too high Check application and consult factory 7 Loose flywheel or belt Tighten 8 Worn piston rod packing Replace 9 Worn wrist pin or wrist pin bushing Replace 10 Worn co...

Page 27: ...scription Qty 1 2136 Center head bolt 1 2 5283 Head 1 3 2 259 O ring 1st stage 1 4 2 255 O ring 2nd stage 1 5 2 116 O ring 3 6 2825 Pipe plug 1 1 2 NPT 6 Head Assembly Bill of Materials Ref No Part No...

Page 28: ...5276 Unloader piston spec 6P 1 8 5000 87SS Retainer ring 1 9 5280 Unloader washer 1 10 5278 X Piston seal assembly 2 11 5345 Unloader body spec 6P 1 12 5281 Unloader washer 1 13 5000 150SS Retainer r...

Page 29: ...20 x 3 8 1 5 5272 Unloader piston cap 1 6 5279 X Piston seal assembly 1 7 5276 Unloader piston spec 6P 1 8 5000 87SS Retainer ring 1 9 5280 Unloader washer 1 10 5278 X Piston seal assembly 2 11 5345 U...

Page 30: ...nal 4 8 5318 3X2 Discharge valve assembly 2 Ref No Part No Description Qty 1 3856 3X2 Suction valve assembly 2 2 3856 Valve seat 4 3 3920a Valve stud 4 4 4230 Inner valve plate 4 5 4229 Outer valve pl...

Page 31: ...ring 1773 PTFE std 3 1771 PTFE std 3 1773 2 Alloy 50 opt 3 1771 2 Alloy 50 opt 3 1773 3 PEEK opt 3 1771 3 PEEK opt 3 5 Locknut 1482 1 1482 1 6 Lock pin 1483 1 1483 1 7 Shim washer thick 1735 As req 65...

Page 32: ...1a c Wrist pin bushing 8 3542a Connecting rod bearing Connecting Rod and Crosshead Assembly Bill of Materials a Included with connecting rod assembly b Torque connecting rod nut to 40 ft lbs c Must be...

Page 33: ...5000 175 Retainer ring 2 1728 Washer 3 1731 Spring 4 1724 Male packing ring 5 1725 V ring packing 6 1723 Female packing ring 7 1751 Cartridge 8 1722 X Adjusting screw 9 1725 2X V ring packing set 10...

Page 34: ...x 1 3 4 ferry head 16 16 3443 Pipe plug 1 2 NPT 2 17 3442 Pipe plug 1 4 NPT 3 18 1748 Cartridge plate 2 19 5000 350 Retainer ring 2 20 1761 Crankcase gasket 1 21 1760 Inspection plate gasket 1 22 172...

Page 35: ...el Assembly Details for Model WFD551 Flywheel Assembly Bill of Materials Assembly Number Assembly Name 1762 X Flywheel assembly flywheel hub and three bolts 1762 Flywheel 19 5 O D 4 groove H E 2 125 H...

Page 36: ...4 45 46 47 48 42 51 49 56 50 36 32 59 55 33 60 62 42 28 55 61 Includes all parts shown except 52 and 53 50 58 Inside of Bearing Carrier Pump Cover Oil Filter Adapter Oil Passage Hole Pumpside of adapt...

Page 37: ...sting screw locknut 40 1292 Relief valve spring 41 1293 Relief valve ball 42 4222 Xb Oil filter adapter assembly w pin 43 2 228Ac O ring 44 2849 1Xb Oil pump assembly 45 2851 Spring guide 46 2852 Oil...

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Page 40: ...KEN INC A Unit of IDEX Corporation 9201 North I 35 Service Road Oklahoma City OK 73131 Phone 405 946 5576 Fax 405 948 7343 Visit our website at www corken com or e mail us at cocsalesdept idexcorp com...

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