Tennant ATLV 4300 Service Manual page 180

Series 26 - Model 26000 Single Gear Pumps
Reassembly
7 Install new o-ring in groove of backplate.
8 Make sure port orientation is correct and then slide
backplate over gear shafts until dowel pins are engaged.
9 Secure with cap screws and new washers . Tighten cap
screws evenly in a crisscross pattern 34 to 38 N•m [25 to 28
lbf•ft] torque.
10 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.
11 Place 1-5/16 in. O.D. sleeve over shaft and press in shaft
seal until flush with front surface of front plate.
13 Install key on keyed shaft.
Note: Refer to Start-up Procedure and Trouble Shooting
Procedure.
10