AIRLESSCO MP 300 Operation And Repair Manual Download Page 1

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For portable application of architectural paints and coatings. For professional use only.
Not approved for use in European explosive atmosphere locations.

3000 psi (20.7 MPa, 207 bar) Maximum Working Pressure

See page 3 for model information.

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Important Safety Instructions

Read all warnings and instructions in this

manual and in gun manual. Save all

instructions.

Gun Manual

312363 - English
312364 - Spanish
312365 - French

Operation/Repair/Parts

MP 400/300
Mustang 4800
Airless Paint Sprayer

332882A

ti22320a

ti22317a

Hi-Boy Model

Stand Model

Summary of Contents for MP 300

Page 1: ...ar Maximum Working Pressure See page 3 for model information Related Manuals Important Safety Instructions Read all warnings and instructions in this manual and in gun manual Save all instructions Gun...

Page 2: ...Servicing the Fluid Pump 14 Fluid Pump Disconnect 14 Servicing the Inlet Valve Hi Boy 16 Servicing the Inlet Valve Stand 16 Packing Replacement Procedures 16 Gear and Pump Assembly 18 Replacement of...

Page 3: ...odel No Series Hi Boy Stand 120V 240V Euro 220V CN 220V LA 220V AP 230V ANZ MP300 868058 A x x MP400 868050 A x x 868051 A x x 868054 A x x 868055 A x x 868056 A x x 868057 A x x 868060 A x x Mustang...

Page 4: ...lectric shock When repair or replacement of the cord or plug is required do not connect the grounding wire to either flat blade terminal The wire with insulation having an outer surface that is green...

Page 5: ...se a paint or a solvent containing halogenated hydrocarbons Keep spray area well ventilated Keep a good supply of fresh air moving through the area Keep pump assembly in a well ventilated area Do not...

Page 6: ...suse can cause death or serious injury Always wear appropriate gloves eye protection and a respirator or mask when painting Do not operate or spray near children Keep children away from equipment at a...

Page 7: ...s you are using Store hazardous fluid in approved containers and dispose of it according to applicable guidelines PERSONAL PROTECTIVE EQUIPMENT You must wear appropriate protective equipment when oper...

Page 8: ...Control Knob Adjusts pressure Turn clockwise to increase pressure and counterclockwise to decrease pressure C Prime Valve Primes pump D Prime Valve Open Position Valve is in open position when handle...

Page 9: ...pressure hold metal part of the spray gun dispense valve firmly to the side of a grounded metal pail then trigger the gun valve The sprayer cord includes a grounding wire with an appropriate grounding...

Page 10: ...n the unit off 3 Disengage the gun trigger lock and trigger the gun to relieve residual fluid pressure Hold metal part of the gun in contact with grounded metal pail Use minimum pressure 4 Re engage g...

Page 11: ...day before storing and before repairing equipment Flushing 1 Make sure the gun trigger lock is engaged and there is no spray tip in the gun Refer to the separate instruction manual provided with gun f...

Page 12: ...control knob to minimum pressure place prime valve in prime open position and engage the gun trigger lock 12 If you are going to store the sprayer see Storage page 13 Engage the gun trigger lock 13 W...

Page 13: ...material that could harden in the sprayer overnight flush the sprayer after use See Flushing page 11 Storage Short Term 1 Flush sprayer with compatible solvent before stor ing then fill the pump and...

Page 14: ...6 Push the brush retainer clip in and withdraw 7 Remove the worn brushes 8 Install new brushes in the reverse order 9 To increase brush life new brushes Part 331780 need to have a run in period After...

Page 15: ...ring suc tion ball and suction ball guide in the suction nut 7 and screw onto fluid pump body For Stand Reassemble lower suction valve assem bly by placing the o ring PTFE ring on stop of ball cage o...

Page 16: ...down through the packings and out of the pump 4 Push the packing removal tool up through the pump and remove from the top bringing packings spacer and springs along with it leaving fluid body empty Ma...

Page 17: ...the packing holder 20 and replace the white O ring 24 and the black O ring 25 with new ones from the packing kit 14 Slide the packing holder 20 over the top fo the upper packings so they fit inside 15...

Page 18: ...bolts 2 from front of cover and back of box 4 Lay unit on its back and disassemble gearbox 5 Inspect bearings 14 17 Crosshead Assembly 15 Gearcrank 16 and sleeve bearing inside the Crosshead assembly...

Page 19: ...ng screw nearest to On Off Toggle Switch B On Off Toggle Switch 1 Lower the pressure control assembly as described above 2 Disconnect the two wires on the toggle switch 3 Use a 9 16 wrench to loosen t...

Page 20: ...rvice inlet and outlet valves Unit primes but has poor or no pressure Pressure set too low Turn up pressure Filter s are clogged Clean or replace gun filter inlet filter and or manifold filter Outlet...

Page 21: ...ing the control settings and power source replace the pressure control assem bly Motor Remove the motor brush covers and turn the machine ON Set the pressure control at max imum pressure and check for...

Page 22: ...1 10 557391 PLUG 1 4 NPT 1 44 FITTING 1 46 GAUGE pressure 1 Not included in Manifold Kit 868014 See page 27 ti22327a 8 9 10 11 12 13 159 160 157 158 Ref Part Description Qty 8 331011 FLUID PUMP BODY...

Page 23: ...i22328a Ref Part Description Qty 1 331101 FRAME CARRY 1 2 16F551 FASTENER THREAD EXTERNAL 4 42 331048 RUBBER BOOT 2 53 HSE1450 HOSE CPLD 1 4 x 50 ft MP400 Mustang 4800 1 245449 HOSE 1 4 x 25 ft MP300...

Page 24: ...a Ref Part Description Qty 2 331273 FRAME 1 3 16F551 FASTENER THREAD EXTERNAL 4 4 866356 SPACER 2 5 867736 WHEEL 10 X 3 5 2 6 143029 COLLAR SCREW SET 2 7 331048 RUBBER BOOT 2 77 HSE1450 HOSE CPLD 1 4...

Page 25: ...27 868013 SEAL rubber 1 28 331342 SCREW 10 24 X 0 50 6 29 116969 NUT lock 2 30 331185 STRAIN RELIEF 2 31 301083 SWITCH toggle 1 32 301150 BOOT rubber black 1 33 15V909 SCREW M8 X12 2 34 868018 CONTROL...

Page 26: ...d Drive Parts Diagram 3 8 6 7 9 24 15 16 17 19 18 10 12 11 23 4 4 5 5 51 52 26 25 33 33 30 30 28 20 41 22 44 43 40 13 56 57 57 58 58 45 44 46 159 160 157 158 66 69 35a 35b 35c 35d 35e ti17481a ti22329...

Page 27: ...8 331342 SCREW MACH PANHEAD 4 30 331185 STRAIN RELIEF 2 31 116969 NUT LOCK not shown 2 33 15V909 SCREW M8X12 2 35 866477 COVER FRONT ASSEMBLY Includes 35a 35b 35c 1 35a 331046 BEARING 1 35b 331061 SLE...

Page 28: ...15 331018 SPACER 1 16 331025 WASHER SPRING 3 17 331022 MALE GLAND 1 18 331023 PACKING POLYETHYLENE 3 19 331021 FEMALE GLAND 1 20 331019 PACKING HOLDER 1 21 331037 PACKING NUT 1 22 331307 PACKING LEATH...

Page 29: ...3 WASHER 2 3 331197 SCREW 2 ti16059a Stand Chassis Ref Part Description Qty 1 331290 SUCTION HOSE ASSEMBLY 1 2 187651 INLET STRAINER 1 4 HOSE 1 4 ID X 3 8 OD 40 5 244035 DEFLECTOR BARBED 1 6 114287 FI...

Page 30: ...reen Pressure Control Red Ground Brown Blue To Motor 120V ti22336a ti22337a 230V 1 7 To Motor Board Kit 868018 3 1 7 Board Kit 868019 Ref Part Description Qty Ref Part Description Qty 1 POWER CORD 3 3...

Page 31: ...Mustang 4800 0 021 MP300 0 019 Fluid outlet npsm 1 4 inch Wetted parts zinc and nickel plated carbon steel nylon stainless steel PTFE acetal leather UHMWPE aluminum tungsten carbide Dimensions Stand L...

Page 32: ...h of warranty shall be as set forth above The buyer agrees that no other remedy including but not limited to incidental or consequential damages for lost profits lost sales injury to person or propert...

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