O P E R A T O R ’ S M A N U A L and Set-Up Instructions for G R AV I T Y BOXES 250-7S Gravity Box 250-7SB Gravity Box J. & M. Mfg. Co., Inc. P.O. Box 547 Ft. Recovery, OH 45846 Ph: (419) 375-2376 Fax: (419) 375-2708 JMMAN0101 (Rev. 02/06/09) www.jm-inc.
TO THE DEALER: Read manual instructions and safety rules. Make sure all items on the Dealer’s Pre-Delivery and Delivery Check Lists in the Operator’s Manual are completed before releasing equipment to the owner. The dealer must complete the Warranty Registration Card attached to the inside of this manual and return to J. & M. Mfg. Co. Inc. at the address indicated on the card. Warranty claims will be denied if the Warranty Registration Card has not been completed and returned. EXPRESS WARRANTY: J. & M.
250-7S GRAVITY BOX SPECIFICATIONS DIMENSIONS* A) 120” B) 57 1/2” C) 79 1/2” D) 68” E) 88” F) 84” G) 187” H) 17” DIMENSIONS** A) 120” B) 57 1/2” C) 103” D) 74” E) 93” F) 84” G) 192” H) 19” * 250-7 Gravity Box, less sides, mounted on 8 Ton Running Gear with 11L-15 Tires. ** 250-7 Gravity Box, with sides and rocking bolster, mounted on 10 Ton Running Gear with 12.5L-15 Tires.
GENERAL INFORMATION BOLT TORQUE CHART Always tighten hardware to these values unless a different torque or tightening procedure is listed for a 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: SAE for SAE hardware and Metric for metric hardware. Make sure fastener threads are clean and you start thread engagement properly.
TABLE OF CONTENTS INTRODUCTION 2 EXPRESS WARRANTY 2 SPECIFICATIONS 3 GENERAL INFORMATION 3 BOLT TORQUE CHART 4 SAFETY RULES 6 SAFETY SIGNS 7 OPERATION 8 ROUTINE MAINTENANCE 8 PARTS LIST/DIAGRAMS 9 LIGHT KIT 10-11 SERVICE RECORDS 12 5
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, judgement, and proper training of personnel involved in the operation, transport, maintenance and storage of equipment.
50-16 OWNER’S MANUAL SAFETY SIGNS ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Replace Immediately If Damaged or Missing! IMPORTANT: Install new safety signs if the old signs are destroyed, lost, painted over or cannot be read. When parts are replaced that have safety signs, make sure you install a new sign with each new part. New signs are available from the manufacturer or your authorized dealer. 7 Ref.
750-16 OWNER’S MANUAL OPERATING INSTRUCTION / MAINTENANCE BE CERTAIN THAT ALL POWER IS SHUT OFF BEFORE SERVICING THE GRAVITY BOX.
GRAVITY BOX PARTS LIST # 1 2 3 4 5 6 7 8 9 10 Part # SL-5 C-15 S-1510 E-157 TF-21 CWA-250 IWK-1 381-HBN-F 381-HBN 12412BN Description Ladder Corner for 15" Boards Sideboard, 15" x 10' Endboard, 15" x 7' Chute Fastener, 21" Complete Wheel Assembly Inspection Window Kit 3/8" x 1" Flange Bolt w/Nut 3/8" x 1" Bolt w/Nut 1/2" x 4 1/2" Bolt w/Nut Qty 1 4 2 2 1 1 2 34 2 4 ROCKING BOLSTER ASSEMBLY # 1 2 3 4 5 Part # URB-250 LRB-250 RR-250 78BNW 38412-BNW Description Upper Rocking Bolster Lower Rocking Bolster
GRAVITY BOX LIGHT INSTALLATION GUIDE GRAVITY BOX LIGHT KIT PARTS LIST * Assembled as one unit # Part # Description 1 7-WCE 7-Wire Connector End Qty 2 7-WNB 7-Wire Nose Box 1* 3 WH-1 Main Wiring Harness 1* 4 LH-1 Light Harness 1 5 AB-1F Front Angle Bracket 1 6 AB-1R Rear Angle Bracket 1* 7 LE-1B Light Enhancer 1 8 LT-R1 Red Light 2 9 LT-A1 Amber Light 2 1* 10 PG-1L Plastic Grommet 1 11 RD-A1 Amber Reflective Decal 6 12 RD-R1 Red Reflective Decal 2 13 RD
GRAVITY BOX LIGHT KIT SET UP INSTRUCTIONS: Mount the Front Angle Bracket to the front diagonal brace of the gravity box using two 1/4” x 3/4” self-tapping screws. Slide the Main Wiring Harness 7-Prong Connector End through the Front Angle Bracket towards the hitch. The black and white wire and 7-Wire Nose Box on the Main Wiring Harness should run to the rear of the gravity box through either the steel runner or conduit. Place black Plastic Grommet around the circular cut-out of the Front Angle Bracket.
SERVICE / MAINTENANCE RECORD DATE DESCRIPTION NOTES 12
