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O
PERATOR
S
AND
ERVICE
R420
This manual covers the following serial numbers
and higher for each model listed:
420R . . . . . . . . . . . . . . . . . . . . . 4200395
420H . . . . . . . . . . . . . . . . . . . . . 4250487
420HC . . . . . . . . . . . . . . . . . . . . 4271101
S
R
MART
AMMERS
MBW, Inc.
250 Hartford Rd • PO Box 440
Slinger, WI 53086-0440
Phone: (262) 644-5234
Fax: (262) 644-5169
Email: mbw@mbw.com
Website: www.mbw.com
'
S
S
AFETY
M
ANUAL
MBW (UK) Ltd.
Units 2&3 CochraneStreet
Bolton BL3 6BN
Phone: 01404 387784
Fax: 01204 387797
MBW FRANCE S.A.R.L.
Z.A. d'Outreville
11 rue Jean Baptiste Néron,
60540 BORNEL
FRANCE
Teléfono: +33 (0) 3 44 07 15 96
Fax: +33 (0) 3 44 07 41 28
Correo electrónico: mbwfrance@free.fr
L16770 / 08.09.U
©MBW, Inc. 2006
Printed in the USA
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Summary of Contents for MBW R420
- Page 1 420H ..... 4250487 420HC ....4271101 MART AMMERS MBW (UK) Ltd. MBW, Inc. MBW FRANCE S.A.R.L. Units 2&3 CochraneStreet 250 Hartford Rd •...
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Page 2: Table Of Contents
ABLE ONTENTS Safety Information ..... . 1 Torque Chart ....... 7 Service Tools . - Page 3 This page intentionally left blank.
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Page 4: Safety Information
MBW does monoxide, a poisonous, odorless, invisible not by the publication of these precautions, imply or in any gas. Death or serious illness may result if way represent that these are the sum of all dangers present inhaled. - Page 5 CAUTION 23(5$7,1* 81/($'(' Read the Operating Instructions before operating this piece of *$62/,1( ,16758&7,216 equipment. Keep unauthorized and untrained people away from this equipment. &KHFN IXHO OHYHO 14781 ROTATING & MOVING PARTS! 2SHQ IXHO YDOYH Make sure all guards and safety devices are in place.
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Page 6: Specifications
PECIFICATIONS 420H/420HC 421H/421HC 420HL 421HL Operating Weight - lbs(kg) 126 (57) 135 (61) 134 (60.8) 141 (64) Height - in(cm) 38.25 (97.2) 38.25 (97.2) 38.25 (97.2) 38.25 (97.2) Width - in(cm) 14.25 (36.2) 14.25 (36.2) 14.25 (36.2) 14.25 (36.2) Length - in(cm) 26.88 (68.3) 26.88 (68.3) 28.25 (71.8) -
Page 7: Operation
Introduction Choke engine if necessary (you may not need to choke a warm engine). MBW equipment is intended for use in very severe Pull starter rope repeatedly until engine starts. applications. They are powered by four cycle engines and are available in different sizes and a selection of engines. -
Page 8: Maintenance
AINTENANCE WARNING CAUTION Always exercise the stopping procedure before Always verify fluid levels and check for leaks after servicing or lubricating the unit. changing fluids. After servicing the unit, replace and fasten all Do not drain oil onto ground, into open streams, guards, shields, and covers to their original or down sewage drains. -
Page 9: Changing Percussion System Oil
If the oil is not visible in the sight gauge, add oil as With the handle still on the ground, remove the four required. See Fluid Levels for recommeneded type hex head flange screws (page 18, #8) holding the of oil. cover (page 18, #2) to the gearbox (page 18, #4). -
Page 10: Service
ERVICE Assembly and disassembly should be performed by a Service Tools service technician who has been factory trained on MBW equipment. The unit should be clean and free of debris. Part No. Description Pressure washing before disassembly is recommended. 01629 Rubber Test Mat •... -
Page 11: Clutch Removal
For 420H and 420HC machines with Honda GX100 Insert the setscrew into the piston pin (#5) and engine remove the piston pin. See Figure 1. Follow steps 1 through 3 under "Handle Removal". Remove the four metric hex head flange screws (page 20, #36) securing the engine guard (page 20, #20) to the engine (#7). -
Page 12: Gearbox Assembly
Remove the needle bearing (#6) from the gearbox Press the large ball bearing (#2) into the gearbox with a blind hole bearing puller tool (MBW #07552). from the back. Secure with a retaining ring (#10). Pinion Removal Press a new oil seal (#11) into the gearbox. Make sure the oil seal is pressed in straight. -
Page 13: Lower Unit Disassembly
20. Assemble the upper bellows ring (page 16, #8) to the Insert the springbox tool (MBW #06468) rods into the other side of the bellows. springbox assembly as shown in Figure 3. 21. Insert four hex head flange screws (page 18, #7) -
Page 14: Gearbox And Lower Unit Assembly
(#1). Refer to Gearbox and Lower Unit Assembly, page 18. Insert the springbox tool (MBW #06468) rods into the springbox as shown in Figure 4. Rotate the ram head (page 16, #17) in the lower unit so the threaded hole on top is positioned toward the front of the shoe (#13). -
Page 15: Parts Replacement Cycles And Tolerances
Parts Replacement Cycles and Tolerances Replace anytime a bearing is rough, binding, discolored or removed from housing or Bearings shaft. Bellows Replace when they are worn, cracked, or to the point of leaking. Replace clutch if shoes and/or springs show signs of heat damage or if it does not Clutch disengage below 2000 rpm. -
Page 16: Replacement Parts
Their sales engineers are Decal available for professional consultation. If you cannot locate an MBW distributor in your area, contact MBW or one of our Sales Branches listed below. When ordering replacement parts, be sure to have the following information available: •... -
Page 17: Gearbox Assembly
Gearbox Assembly - 14 -... - Page 18 ITEM PART NO. DESCRIPTION 01001 RETAINING RING, EXT. 5100-137 01103 BEARING, BALL 01105 BEARING, BALL 01244 RETIANING RING, EXT. 5160-112 06161 ROD ASSEMBLY, CONNECTING 06259 BEARING, NEEDLE 06262 BUSHING 06264 RETAINING RING, INT. N5000-187 06265 RETAINING RING, EXT. 5100-78 06266 RETINAING RING, INT.
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Page 19: Lower Unit Assembly
Lower Unit Assembly - 16 -... - Page 20 ITEM PART NO. DESCRIPTION 06239 O-RING, 3.36 ID X 0.139 DIA 06457 GAGE, VIEW 07154 RING, CLAMPING, LOWER 09618 FITTING, PLUG PARKER 4HP50N 11694 BELLOWS, 4 PLY 16305 SPRING, COMPRESSION, 2.313 OD 16306 SPRING, COMPRESSION, 1.700 OD 16311 RING, CLAMPING, UPPER 16320 GUARD, SPRINGBOX 16323...
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Page 21: Gearbox And Lower Unit Assembly
Gearbox and Lower Unit Assembly - 18 -... - Page 22 ITEM PART NO. DESCRIPTION 07203 PIN,DOWEL 1/4 x 1/2 16313 COVER, RAMMER GEARBOX 16334 GEARBOX ASSEMBLY (See page 14 for breakdown) 16349 PIN, GROOVED 16361 GASKET, COVER 19619 LOWER UNIT, 420 19617 LOWER UNIT, 421 F051807FWS FLANGE SCREW,5/16-18 x 7/8 ZP F051810SSSD SOCKET HEAD SET SCREW, 5/16-18UNC X1.25LG DOG PT F0518HN...
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Page 23: Handle Assembly
Handle Assembly - 20 -... - Page 24 ITEM PART NO. DESCRIPTION 01035 HOSE, FUEL 6” LONG (420H only) 17720 HOSE, FUEL 7-1/2” LONG (420R and 420HC only) 01045 FILTER, FUEL, IN-LINE 01052 CLAMP, HOSE 01145 CLAMP, SPRING 07351 TORSION MOUNT 07916 FERRULE, THROTTLE LEVER 14715 THROTTLE, RATCHET STYLE 15183 HOSE, FUEL 1-1/2”...
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Page 25: Handle Assembly
Handle - 22 -... - Page 26 ITEM PART NO. DESCRIPTION 18511 HANDLE SUPPORT, LEFT 07351 TORSION MOUNT 18510 HANDLE SUPPORT, RIGHT 18515 SNUBBER 18883 RAMMER HANDLE F051808FWS FLANGE SCREW, 5/16”-18 x 1” ZP F0518FN NUT, FLANGE 5/16”-18 x 7/8 - 23 -...
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Page 27: Engine Assembly
HONDA GX100 Install with high strength Loctite (red). Engine Assembly - 24 -... - Page 28 CUT TO 3” FOR MODELS USING HANDLE MBW #17206 CUT TO 5” FOR MODELS USING HANDLE MBW #18553 HEX HEAD FLANGE SCREW, M8-1.25 X 40mm (Not provided by MBW Inc.) PIN, DOWEL, 6mm X 10mm (420H) (Not provided by MBW Inc.)
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Page 29: Warranty
1.This warranty does not cover any Used Equipment. "Used Equipment" before shipment to MBW. means any MBW machine or equipment that is not a New Machine or a Demonstration Machine. All Used Equipment is sold AS IS/WHERE IS WHAT WILL MBW DO? MBW's obligation under this warranty is limited to WITH ALL FAULTS. - Page 30 OTES - 27 -...
- Page 31 NOTES - 28 -...
- Page 32 OTES - 29 -...
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