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Summary of Contents for MechMaxx BH660
- Page 1 WARRANTY Operator’s Manual www. mechmaxx.com...
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Page 3: Table Of Contents
BEGINNING OF SEASON AND AT TIME OF INSTALLATION. BLEEDING BACKHOE HYDRAULIC SYSTEM TIGHTENING NUTS AND BOLTS THE FOLLOWING LOCATIONS SHOULD BE OILED WITH SAE 30 OIL INSTALLATION AND REMOVAL INSTALLING AN ASSEMBLED BACKHOE ON A TRACTOR www. mechmaxx.com TABLE OF CONTENTS... -
Page 4: Specifications
SPECIFICATIONS Model BH660 BH760 BH860 Power Required 15-35 HP 25-45 HP 35-65 HP Minimum Tractor Weight 1500 lbs 2300 lbs 3200 lbs Minimum Wheel Base 57 in 60 in 70 in Hydraulic Controls Hydro-control Max. working depth 7 ft 8 ft 9 ft Max. - Page 5 Dipper Stick Cylinder Digging Force 1250 lb 2005 lb 2500 lb Total Digging Force 4400 Ib 4845 Ib 5500 Ib Warranty 1 year Dimensions (L x W x H) 88*32*41 in Weight(N.W./G.W.) 977/1170 Ib 1010/1204 Ib 1133/1327 Ib www. mechmaxx.com SPECIFICATIONS...
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Page 6: Safety Signs
Always move tractor 3-point hitch control to fully lowered position while backhoe is mounted to tractor Use special hitch parts supplied with backhoe only.See operator's manual for proper assembly and adjustment of hitch. www. mechmaxx.com SAFETY SIGNS... -
Page 7: Safety
Unfortunately, our efforts to place. If shield removal becomes necessary for repairs, provide safe equipment can be wiped out by a single replace the shield prior to use. careless act of an operator or bystander. www. mechmaxx.com SAFETY... -
Page 8: Safety Precautions Continued The Tractor And/Or Loader (If Equipped)
12.DO NOT dig under stabilizers or tractor backhoe. Soft 4.Move wheels to the tractor manufacture's widest ground or sandy soil can cause caveins. recommended settings to increase stability. 13.KEEP BUCKET away from the stabilizer area to avoid possible stabilizer damage. www. mechmaxx.com SAFETY... -
Page 9: Transportation
5.PROTECT YOUR EYES - WEAR SAFETY GLASSES. 6.GUARD AGAINST INJURY when driving connecting pins or performing any repair in which particles can chip from work piece or striking tool. 7.DO NOT remove any guards on backhoe or tractor. www. mechmaxx.com SAFETY... -
Page 10: Operating Instructions
Refer to "DIMENSIONS AND SPECIFICATONS" for hydraulic flow BOOM SAFETY LOCK volume requirement. When powering from tractor systems with higher output, reduce engine RPM to obtain PIN GOES HERE acceptable backhoe operating speed. www. mechmaxx.com OPERATING INSTRUCTIONS... -
Page 11: Operating The Backhoe
Best results are obtained by digging near the center of the come up off of the ground. swing arc so material can be dumped on either side. 4.DO NOT dig near the stabilizers. 5.DO NOT touch overhead wires with any part of the back- hoe. www. mechmaxx.com OPERATING INSTRUCTIONS... -
Page 12: Transporting The Backhoe
OR TRAILER. lowered to bed when possible. DO NOT attach hold down chain anywhere on backhoe assembly Block and secure tractor only. Placing the Stabilizers Decreased Digging Depth Stabilizers Properly Positioned Stabilizers Improperly Positioned Narrower Stabilizer Platform www. mechmaxx.com OPERATING INSTRUCTIONS... -
Page 13: Filling The Bucket
To obtain a cleaner trench and avoid the buildup of materi- al directly in front of the backhoe, crowed out and completely curl the bucket while starting to lift it from excavation. In this way, excess material will fall back into excavation. www. mechmaxx.com OPERATING INSTRUCTIONS... -
Page 14: Side Slope Excavating Or Trenching
Level the backhoe on slops with the stabilizers to dig plumb trenched, or use the backhoe or loader to cut a level slot for the uphill wheel and stabilizer, Pile the spoil from the slot on the low side. www. mechmaxx.com OPERATING INSTRUCTIONS... -
Page 15: Finishing Straight Walls
Pull both the crowd and lift levers for smooth, even backfilling. IMPORTANT: Do not backfill by using the swing circuit and dragging the bucket sideways. Doing so can cause damage to the dipper stick boom swing cylinders or main- frame www. mechmaxx.com OPERATING INSTRUCTIONS... -
Page 16: Service
BEGINNING OF SEASON AND AT TIME OF Hydraulic System Hoses INSTALLATION. Oil leaks in the pressure side of the system can be locat- ed by carefully inspecting the external area of the hoses and fittings. www. mechmaxx.com SERVICE... -
Page 17: Tightening Nuts And Bolts
Check all pivot pins for cotter pins, washers and retain- and removal procedures. ers; if missing, replace. Lubrication Economical and efficient operation of the backhoe is dependent upon regular and proper lubrication of all moving parts with a quality lubricant. www. mechmaxx.com SERVICE... -
Page 18: Installing An Assembled Backhoe On Atractor
Loader Mount Weldment. Again, this is accomplished by using the boom hydraulics. 8.Shut off tractor and engage parking brake. 9.Secure pivoting latches using Lock Pins and Hair Pin Clips. www. mechmaxx.com SERVICE... -
Page 19: Stabilizer Pads
NOTE: When using the following chart, if it is decided that an overhaul of components or pressure adjustments are necessary to correct malfunctioning, it is recommended that your dealer make these repairs. He is equipped to do this work. www. mechmaxx.com SERVICE... -
Page 20: Trouble Shooting
If it has been "belled" check for restriction from outlet to reservoir of valve which engaged. would cause excessive back pressure. See item 30 at the 6.Insufficient pumping - advance engine throttle. end and item 9. TROUBLE SHOOTING www. mechmaxx.com... - Page 21 Float bonnet assembly supplied packing’s are used in cylinder repair. Everything must be clean and free of dirt during the oil line removal and replacement, and during any cylinder work. www. mechmaxx.com TROUBLE SHOOTING...
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Page 22: Replace Center Section Assemblies
Prevent spools from turning or moving by inserting a screw driver through the clevis slot, or by running a rod through the pin hole and using the rod as a handle. DO NOT hold the spool with a wrench. This will destroy the finish. TROUBLE SHOOTING www. mechmaxx.com... -
Page 23: Assembly
ASSEMBLY CONTROL VALVE SECTION Typical Section for Actuate (Bucket) & Swing Circuits) *Cv126 VALVE PART LIST for the BH660 Control Valve. www. mechmaxx.com ASSEMBLY... -
Page 24: Control Valve Section
CONTROL VALVE SECTION *CV556 VALVE PARTS LIST That Comes with the BH760. www. mechmaxx.com ASSEMBLY... -
Page 25: General Unpacking
7 Attach Stabilizer Cylinders (H) to stabilizer (F) using pins and hardware assembled to stabilizer (F) 8 Follow the mount kit instructions section of the Operator’s manual. Check the installation carefully and make sure that all members are correctly installed and securely fastened. www. mechmaxx.com ASSEMBLY... -
Page 26: Point Components And Hookups
POINT COMPONENTS AND HOOKUPS These parts come with your 3 point Backhoe, both models BH660 / BH760 /860 Some parts may vary in size or length for each model. Top link Attach to BH frame 3 point shown mounted on a tractor ATTACHING KIT INSTRUCTIONS 3-POINT HITCH LINKAGE &... - Page 27 1.Use hoist to raise the backhoe mainframe so that the boom pivot pin is approximately 12”(BH660), or 14” (BH760), off the ground. 2.Back tractor close to the backhoe. Connect tractor lower link arms to lower link mounts, using two L-pins(4), two cotter pins, and two snap pins (7).
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Page 28: Hydraulic Hook-Up
1 Attach to the left side of the backhoe control valve, the 3.Reconnect and tighten hydraulic hose that was long 90 degree adapter union, the 48 inch hydraulic hose, removed in step 1 Straight Adapter Union, Dust Plug, and female coupler to the OUTLET port on the valve. www. mechmaxx.com ASSEMBLY... -
Page 29: Loader Valve Pressure Line (From Loader Power Beyond Port)
200 ft. Ibs. 325 ft. Ibs. 470 ft. Ibs. Note - See tractor instruction manual or your tractor dealer for tightening of metric bolts. Valve low pressure outlet Valve high pressure outlet Bucket Dipper Stabilizer right/left Swing Boom down/up www. mechmaxx.com ASSEMBLY... -
Page 30: Parts Diagram
Circlip 50 Ball Driving Gear Shaft Oilseal 50*35*7 Greasy blockage M16*1.5 Paper pad Bonded washer 16 Box II Box I Nut M6 Exhaust bolt Spring washer 6 Round pin 5*16 Hexagon Socket head screws M6*35 Oilseal 72*50*10 www. mechmaxx.com PARTS DIAGRAM... - Page 31 DESCRIPTION Base frame Bolt M20*120 Support pin Joint plate Lower connecting weldment (left) Draw bar Nylon lock nut M20 Lower connecting weldment (right) Plain washer 20 Blot M20*55 Bolt M20*95 Bolt M20*185 R pin 4 Spacer www. mechmaxx.com PARTS DIAGRAM...
- Page 32 PARTS DIAGRAM www. mechmaxx.com PARTS DIAGRAM...
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Page 33: Ref Description Qty Ref
Dust cover 60*120 Split pin 5*35 51-1 Ball head nut M10 Spring pin slotted 5*30 55-1 Upper cover Stablizer cylinder 56-1 Bolt M8*25 Leg fixed pin Pin for leg support Leg support Stabilizer leg Base frame www. mechmaxx.com PARTS LIST... -
Page 34: Parts Diagram
Pin for dipper Boom Bolt M8*55 Hoop 16*25 Pin for dipper cylinder I Pin for boom cylinder II Dipper cylinder Boom cylinder Pin for dipper cylinder II Pin for boom cylinderIII Bolt M8*60 Safty pin for boom www. mechmaxx.com PARTS DIAGRAM... - Page 35 Spring washer 8 Bucket cylinder Nut M12 R pin Bucket Pin for thumb I Pin for bucket I Split pin 5*35 Link Support bracket Tunmb support Link guide (left) Pin for thumb II Link guide (right) www. mechmaxx.com PARTS DIAGRAM...
- Page 36 PARTS DIAGRAM www. mechmaxx.com PARTS DIAGRAM...
- Page 37 Outlet pipe for value Tank Inlet nipple for value Nipple for value Inlet pipe for value Multiple unit valve Outlet nipple for value Outlet pipe for stabilizer cylinder Stabilizer cylinder Inlet pipe for stabilizer cylinder Swing cylinder Three-way connection www. mechmaxx.com PARTS LIST...
- Page 38 info@mechmaxx.com...
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