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Manual GRAVIT Y WAGON MODEL O P E R A T O R ’ S M A N U A L J&M Manufacturing Co, Inc 284 Railroad Street - P.O. Box 547 | Fort Recovery, OH 45846 | Ph: (419) 375-2376 | Fax: (419) 375-2708 www.jm-inc.com...
To the Dealer TO THE DEALER Read manual instructions and safety rules. Make sure all items on the Dealer’s Pre-Delivery and Delivery Check Lists are completed before releasing equipment to the owner. The dealer must complete the Warranty Registration found on the Dealer Portal website located at dealer.jm-inc.com and return it to J&M Mfg.
General Information TO THE OWNER: The purpose of this manual is to assist you in operating and maintaining your gravity wagon in a safe manner. Read it carefully. It furnishes information and instructions that will help you achieve years of dependable performance and help maintain safe operating conditions. If this machine is used by an employee or is loaned or rented, make certain that the operator(s), prior to operating: 1.
Safety Rules ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Safety is a primary concern in the design and manufacture of our products. Unfortunately, our efforts to provide safe equipment can be erased by an operator’s single careless act. In addition, hazard control and accident prevention are dependent upon the awareness, concern, judgment, and proper training of personnel involved in the operation, transport, maintenance and storage of equipment.
Decals Description Part No. J&M Oval Decal (Large) 9-1/2” x 15” JM0015151 www.jm-inc.com Decal JM0019239 Red Reflective Decal 2” x 9” JM0009945 Orange Reflective Decal 2” x 9” JM0009944 Check All Wheel Nuts Decal JM0018043 Check Tire Inflation Decal JM0018041 Amber Reflective Decal 2”...
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Decals CAUTION FASTEN BOX SECURELY TO WAGON GEAR. KEEP AWAY FROM MOVING PARTS. DO NOT CLIMB INTO GRAVITY TANK. BEFORE HIGHWAY TRAVEL, SECURE A SLOW-MOVING VEHICLE EMBLEM TO THE REAR OF THE BOX IN ACCORDANCE WITH STATE AND LOCAL LAWS. MAKE SURE ALL FLASHER AND TURN INDICATOR/BRAKE LIGHTS ARE WORKING PROPERLY BEFORE INCIDENTAL HIGHWAY...
Bolt Torque Specifications Always tighten hardware to these values unless a different torque or tightening procedure is listed for specific application. Fasteners must always be replaced with the same grade as specified in the manual parts list. Always use the proper tool for tightening hardware. Make sure fastener threads are clean and you start thread engagement properly.
Initial Operation & Maintenance Initial Operation WARNING: Ensure all power is shut off before servicing the gravity wagon. Before the gravity wagon is put into service, check the following items for safe operation: • The track assembly for the door has proper lubrication for less wear on the sprocket and track and easier door operation. •...
Lubrication Your gravity wagon has grease fittings at all critical points. These should be serviced before the gravity wagon is put into operation each season. HOW TO FLUSH OLD OIL OUT OF THE OIL BATH HUBS Your gravity wagon is equipped oil bath hubs. Follow these steps to flush the oil bath hubs once per year. Check the hub for leaks and wear.
Bleeding the Brake Lines METHOD ONE (requires two people) Close all bleed screws Start with the wheel furthest from the master cylilnder. Slip a transparent bleed hose on the bleeder stem and place the other end of the hose in a clean container which is partially filled with fluid at all times. The first person depresses the brake plunger SLOWLY.
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Gravity Wagon Trail Adjustment • Ensure the tongue bolt is as tight as possible without over restricting the vertical motion of the hitch. • An extra washer (shown below) can be added if the nut is tightened so far that it runs out of threads before the tongue bolt is as tight as possible.
Fenders Description Part No. 3/8”-16 x 1-1/2” Gr5 Z SF Hex Bolt JM0001633 3/8” ID, 1” OD Z Flat Washer JM0003061 3/8”-16 Gr2 Z Centerlock Hex Nut JM0001512 55 Series Mud Flap JM0033494 Front Lower Left Fender Bracket (655, 755) JM0034359 3/8”-16 x 6”...
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Tongue Assembly with Brakes Description Part No. 3/8”-16 x 1” Gr5 Z SF Hex Bolt JM0002092 Shield for Master Cylinder (SMC-1) JM0019273 5/16”-18 x 3” Gr5 Z Hex Bolt JM0019359 Rubber Boot for Master Cylinder (RB-1415) JM0019358 51-1/8” Long Plunger Pole (655/755) JM0035044 Spindle Bolt 1-1/4”...
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24 Ton Running Gear Description Part No. 55 Series 24 Ton Front Right A-Frame Arm JM0035128 Hitch Weldment, 24 Ton Running Gear JM0029107 7/8” ID x 1” OD x 7/8” LG Bronze Bushing (BB-78) JM0029185 1-3/4” x 11-3/4” King Pin Vertical Hitch Bolt JM0029375 Spindle Bolt (1-3/4”...
Shell Assembly 555 Divider Option Only Description Part No. 755 Sideboard Corner (9-1/2”) JM0034351 755 Front Passenger or Rear Driver Sideboard (105-1/2” Length) JM0034313 3/8”-16 x 1” Gr5 Z SF Hex Bolt JM0002092 755 Sideboard Splice Plate (8-1/2” x 4-5/8”) JM0034319 755 Front Driver or Rear Passenger Sideboard (105-1/2”...
Door Wheel Assembly Description Part No. Rear Mounting Plate (RMP-1) JM0028412 3/8”-16 x 1” Gr5 Z SF Hex Bolt JM0002092 3/4” ID x 7/8” OD x 5/8” LG Bronze Bushing (BB-34) JM0009455 1/4”-20 Gr2 Z Centerlock Hex Nut JM0001505 3/4” USS Z Flat Washer JM0010006 1/4”-20 x 1”...
Door Assembly Non-Divider Option Divider Option Description Part No. LED Field Light with Bullet Connector JM0050949 3/8”-16 Gr5 Z SF Hex Nut JM0002152 3/8”-16 x 1” Gr5 Z SF Hex Bolt JM0002092 3/16” x 17” Chain with S-Hook (31617-CS) JM0019107 1”...
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Lights Ground (White Wire) Field Light (Black Wire) Tail Light (Brown Wire) Amber Flashing Amber Flashing & Turn Signal & Turn Signal (Yellow Wire) (Green Wire) Description Part No. 1 Red Oval LED Tail Light JM0034389 2 Amber Oval LED Tail Light JM0034392 3 LED Field Light with Bullet Connector JM0050949...