3 - Wacker Neuson Group

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4 PG SERIES PUMPS PT / PG / PD REPAIR Impeller / Mechanical Seal Assembly 4-14 1 7 8 11 9 10 PE-50 3 4 5 6 2 1019SD88 E-50 3
PT / PG / PD REPAIR PG SERIES PUMPS 4 4.17 Impeller CAUTION: When replacing either the impeller (1) or rear pump flange (2), make note of the I.D. numbers found on back of each component casting (3). MAKE SURE REPLACEMENT PARTS HAVE THE SAME NUMBER MARKINGS–THEY ARE NOT INTERCHANGEABLE. Recommended tools: Socket wrench - 1/2" (13mm) Allen wrench - 6mm Plastic / rubber mallet Removal: 1. Remove pump housing. See Section 4.16 Pump Housing. 2. Unscrew impeller (1) counterclockwise from engine shaft (4). Note: If the impeller is hard to remove, tap it with a plastic mallet. Do not lose any adjusting shims. 3. Remove four screws (5) and washers (6) mounting rear pump flange (2) to engine. 4.18 Mechanical Seal Replacement Removal: 1. Remove the impeller (1). See Section 4.17 Impeller. Note: Do not lose any adjusting shims (7). 2. Remove mechanical seal spring (8) and carbon face (9) from engine shaft. 3. Remove mechanical seal ceramic face (10) and L-ring (11) from rear pump flange. Installation: 1. Mount rear pump flange (2) to engine. Secure with screws (5) and washers (6). Apply Loctite 271 or an equivalent high strength threadlocker and torque to 16 ft.lbs. (22 Nm) Note: Install rear pump flange with drain channel facing down. 2. Install mechanical seal. See Section 4.18 Mechanical Seal Replacement. 3. Screw impeller (1) clockwise onto engine shaft. DO NOT apply any threadlocker to threads of impeller or engine shaft. Installation: 1. Clean engine shaft, remove any rust. Also clean contact surface of ceramic and carbon faces with a clean cloth. DO NOT lubricate seal faces. 2. Place ceramic face (10) in L-ring (11) and install in pump flange. 3. Carefully place carbon face (9) and seal spring (8) on engine shaft. 4. Mount impeller to engine shaft. Turn impeller shaft clockwise to tighten. 4-15
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FOREWORD PT / PG / PD REPAIR Namepl
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FOREWORD PT / PG / PD REPAIR Item N
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1 GENERAL PT / PG / PD REPAIR 1.10
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2 OPERATION PT / PG / PD REPAIR 2.1
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Page 112: TORQUE VALUES Metric Fasteners (DIN
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3 - Wacker Neuson Group

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