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Summary of Contents for Eaton 26 Series
- Page 1 Eaton ® December,1995 Gear Pumps Repair Information Series 26 Model 26000 Multiple Gear Pumps...
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Page 2: Table Of Contents
Ordering Information ........................20 Introduction This manual provides service information for the Eaton model 26000 multiple gear pumps. Step by step instructions for the complete disassembly, inspection, and reassembly of the pumps are included. The following recommendations should be followed to insure successful repairs. -
Page 3: Identification
Series 26 - Model 26000 Multiple Gear Pump Identification and Tools Required 26 5 01 - R Z A B 95 01 31 JB Serial Number Code: Product Number: Series Testers Initials 26 = Gear Pump ( SAE "A" Mount ) Day of Month (two digits) Month (two digits) Features... -
Page 4: Exploded View Drawing
Series 26 - Model 26000 Multiple Gear Pump Parts Drawing Cap Screws Shown below Washer Righthand (CW) Rotation Front Plate Triple Pump (Optional) Shaft seal Washer Plug Drive Gear Assembly O-ring Backup Gasket Seal First Pump Wear Plate Parts not Idler Gear included in Body... -
Page 5: Parts List
Series 26 - Model 26000 Multiple Gear Pump Disassembly Repair Information - Model 26000 Parts List Work in a clean area; cleanliness is extremely important when Item repairing hydraulic pumps. Before disconnecting the lines, clean port areas of pump. Disconnect hydraulic lines, removing Description Qty. -
Page 6: Disassembly
Series 26 - Model 26000 Multiple Gear Pump Disassembly 11 Remove wear plate and o-ring seal , noting position of 8 To separate the third pump body from adapter plate use a soft faced hammer and tap to loosen and then lift straight up. open or closed side of wear plate. - Page 7 Series 26 - Model 26000 Multiple Gear Pump 15 Remove second or middle pump body from second set of 20 Tap front adapter plate with a soft faced hammer to loosen gears. and remove adapter plate. After removing adapter, turn it over and remove the second o-ring seal .
- Page 8 Series 26 - Model 26000 Multiple Gear Pump 23 Remove back-up gasket a nd seal from all wear plates. 24 Using a drift punch or similar tool, remove the shaft seal from the front plate. Caution is needed not to damage counter bore of shaft seal area when removing seal.
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Page 9: Reversibility
Series 26 - Model 26000 Multiple Gear Pump Reversibility Changing Input Rotation of Pump To change input rotation of a double or triple pump a 3 After changing plug into proper cavity start the reassembly complete disassembly is required. portion of this booklet. Follow the steps below to alter the front plate assembly to the desired rotation required. -
Page 10: Inspection
Series 26 - Model 26000 Multiple Gear Pump Inspection Inspect Parts for Wear Front plate and Backplate Inspection General 1 Oil groove in bushings in front plate should be in line with dowel pin holes and 180° apart. The oil grooves in the 1 Clean and dry all parts. -
Page 11: Reassembly
Series 26 - Model 26000 Multiple Gear Pump Reassembly General Information Install new seal and new backup gasket into all wear plates. It is important that the relationship of the backplate, bodies, Note in the middle of the backup gasket a flat section or adapters, wear plates, and front plate is correct. - Page 12 Series 26 - Model 26000 Multiple Gear Pump Reassembly Install new o-ring in groove of adapter plate (side with 11 Aligning the previously scribed line of body and adapter, bushings below surface). install the second pump body onto the adapter plate. Align the scribed lines of the first body and front adapter, install adapter plate onto the drive shaft and body.
- Page 13 Series 26 - Model 26000 Multiple Gear Pump 15 Lubricate and install the new o-ring seal onto the rear 20 Lubricate and install the third drive gear onto the shaft and adapter plate. into the pump body aligning key with slot in gear. 21 Lubricate and install the third idler gear assembly into body and adapter.
- Page 14 Series 26 - Model 26000 Multiple Gear Pump 25 Place washer over drive shaft into housing. Liberally oil shaft seal and install over drive shaft, carefully so that rubber sealing lips are not cut. 26 Place 1-5/16 in. O.D. sleeve over shaft and press in shaft seal until its below the surface of the front plate 6.1mm [.24 in].Install retaining ring if required optional feature is used.
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Page 15: Specific Backplate Parts List
Series 26 - Model 26000 Multiple Gear Pump Specific Backplate Parts List Relief Valve Backplate Item Description Qty. Relief Valve Backplate O-ring 19A4 Relief Valve Assembly 19A3 19A2 19A1 Relief Valve 19A1 19A2 O-ring 19A3 Backup Ring 19A4 O-ring Disasembly and Reassembly Plug Assembly 1 After removing relief valve , remove and replace o-rings 19B1... -
Page 16: Placing Pump Back Into Operation
Series 26 - Model 26000 Multiple Gear Pump Placing Series 26 Gear Pump Back into Operation When test stand is available . Start Pump Mount Pump Connect Run For Test Stand Fluid Supply 3 Minutes Each Load Load Load Zero Intermittently Intermittently Intermittently... -
Page 17: Trouble Shooting
Series 26 - Model 26000 Multiple Gear Pump Trouble Shooting Problem Possible Cause Correction Cavitation a. Oil too heavy. a. Change to proper viscosity b. Oil filter plugged. b. Clean filter. c. Suction line plugged or too small. c. Clean line and check size of line. Oil heating a. - Page 18 Series 26 - Model 26000 Multiple Gear Pump Note Wear Plate Identification A product improvement has been made to the Model 26000 gear pump with a new designed wear plate. To identify the new wear plate, look for grooves placed in the seal side of the wear plate as shown below. New Groove Wear Plate Wear Plate...
- Page 19 Series 26 - Model 26000 Multiple Gear Pump Note...
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Page 20: Ordering Information
Order parts from 6-635 Parts Information booklet. Each order must include the following information. 1. Product and/or Part Number 2. Serial Number Code 3. Part Name 4. Quantity... - Page 21 Shanghai 200021 Tel: +41 (0) 21 811 4600 China Tel: 952-937-9800 Tel: 86-21-6387-9988 Fax: 952-294-7722 Fax: +41 (0) 21 811 4601 Fax: 86-21-6335-3912 www.eaton.com/hydraulics © 2008 Eaton Corporation All Rights Reserved Printed in USA Document No. E-PUGE-TS001-E Supersedes 07-625 December 2008...
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