STEP 1A If the tow bar is not squared to the back plate, provide washers or other spacers (per illustration 1-A) to provide a surface parallel to the ground. Position the FSH base plate A above the tow bar E (per illustration 1-B, using identification letters in illustration 1-B). Connect the base plate A to the towing vehicle tow bar E by inserting one of the 1/2″D x 1-1/2″L carriage bolts C into the top of the bottom slot B of the base plate A, then into any spacers D required, and finally in the hole of tow bar E. The bolt C is secured by placing a 1/2” fender washer F on its shank, followed by a 1/2″ split washer G, and finally thread on a 1/2″ hex nut H. Tighten very loosely so that the back of the FSH can slide back against the tow vehicle’s back plate. Once in place, use a 3/4″ wrench to tighten the 1/2″ hex nut H.
STEP 1B The next step is to mark the location of the hole(s) to secure the back of the FSH to the back plate of the tow vehicle. But first...
DO NOT DRILL INTO A GAS TANK ON THE BACK OF A TOW VEHICLE! AN EXPLOSION MAY RESULT THAT COULD INJURE OR KILL!
If the back plate of the tow vehicle forms a right angle with its tow bar and there is no offset (see figure 1A3-1 in “First Alternate Step 3″ section), then either select an available hole or mark clearly where the back hole needs to be drilled. Most of the time, this will be about halfway up the back of the FSH. In addition, if the two 3/8″ slots on the side are used, then mark these holes in an analogous manner. The customer must purchase 3/8″ hardware.
STEP 1C Remove the FSH from the tow bar and set it, the associated spacers, and hardware aside.
STEP 2 Use a small drill bit (3/16″, 1/4″ or 5/16″) to drill a pilot hole, dip the drill bit in cutting oil before drilling. After drilling the pilot hole, use a step drill to increase the pilot hole up to 9/16″. A 9/16″ hole provides clearance for the 1/2″D carriage bolt. If it was elected to use the two 3/8″ bolts on the side, then widen those pilot holes out to 7/16″ diameter.
STEP 3 Tow vehicle no offset (safer and easier if performed by two people): For a tow device that the tow bar is at right angles to the back plate with no offset, reinstall the FSH mainframe, the spacers and hardware on the tow bar. Leave the hex nut loose so that the mainframe can slide on the tow bar. Holding the FSH mainframe in place, insert the other 1/2″D x 1-1/2″L carriage bolt into the back slot of the mainframe, then into the back plate hole drilled in Step 2.
(There must be room to tighten the nut behind the back plate of the tow vehicles. For the typical lawn mower, this requires the use of the right hand behind the back place and in front of the rear-end differential.)
STEP 3 (continued) Holding the carriage bolt in place, reach behind the back plate and place a 1/2” fender washer on the shank of the bolt. Follow this by a 1/2” split washer and a 1/2” hex nut. Loosely tighten the hex nut. Shake the mainframe and guide it into place against the tow bar and back plate. Evenly and securely tighten both hex nuts.
TIGHTENING THE NUTS UNEVENLY WILL TWIST THE MAINFRAME SO THAT THE COMPRESSION PIN SHAFT WILL NOT MOVE EASILY.
STEP 4 Install Compression Assembly Unwrap the compression pin assembly, remove the scotch tape at the end, and remove both custom washers along with the compression spring, as shown in picture 4-1, insert the compression pin shaft into the top hole of the FSH mainframe. As the compression pin shaft goes through the mainframe top plate, slide on custom washer C-1 (4-2). Next, slide on compression spring B (4-3), followed by custom washer 4-4. Allow the end of the compression pin shaft to drop down into the mid-plate hole (4-4).
STEP 4 (continued) Turn the vertical positioning key so that it is aligned with the slot in the top plate of the mainframe (4-5). Once aligned, press down on the knob and turn to the right. The locking key will ride down the front vertical plate of the mainframe (4-6). Continue pressing down, turning to the right, and releasing the knob will lock the positioning key (4-7). This will also lock the end of the shaft in the base-plate hole (4-8 & 4-9). This is the hitched position. Reversing these steps allows the shaft and associated positioning key to ride up the mainframe to the unhitched position (4-10 & 4-11). This is the unhitched position. If one is hitching and unhitching from the seat, it is best to allow the compression pin to float in the unhitched position and not locked up as in picture 4-11.
First Alternate STEP 3: Some tow vehicle models (those that have an offset — see 1A3-1) require a different hardware assembly A-F per illustration A-3 to bridge the offset.
A. 1/2″D X 3-1/2″L CARRIAGE BOLT (1)
B. BACK PLATE OF MAINFRAME (1)
C. 1/2″ FENDER WASHER (3)
D. 1/2″ HEX NUTS (3)
E. 1/2″ SPLIT WASHER (1)
F. TOW VEHICLE BACK PLATE (SIMULATED)
Adjust hex nut D3 until the bolt assembly may easily slide up and down on the back plate of the mainframe B. Adjust the height of the bolt assembly so that the end of bolt A can go through the hole in the back plate of the tow vehicle. After placing the 1/2″ fender washer on the end of the bolt behind the tow vehicle’s back plate, screw on and finger tighten hex nut D1. Using an open end 3/4″ box wrench, securely tighten hex nut D-2. Next tighten back plate hex nut D-3, using the same wrench. Then tighten hex nut on the bolt in the tow vehicle’s tow bar hole, as previously explained in step 3 above.
For tow vehicles with offsets, install the compression pin assembly as done in Step 4.
Second Alternate STEP 3: For tow vehicles with holes in the back plate that align with the side 3/8″ slots, 3/8″ hardware may be installed in an analogous manner as previously discussed. Utilization of 3/8″ hardware in addition to 1/2″ hardware will make the attachment of the FSH to the tow vehicle much stronger.
MAKE SURE THAT THE FSH MAINFRAME IS NOT ATTACHED IN A STRAIN. THE COMPRESSION PIN SHOULD MOVE EASILY UP AND DOWN. FOR THE END OF THE SHAFT TO BUMP ON THE BASE PLATE AS IT SLIDES IN PLACE IS NORMAL.
SEE THE CAUTION NOTES IN THE ACCESSORY’S PAMPHLETS FOR USING THE FSH WITH THE ACCESSORIES.
Neither InnoTech Associates, Inc., InnoTech Associates – PMT5, LLC, any owner of these two companies, nor any officer of these two companies shall be responsible in any way for damage to equipment (such as the tow vehicle or the trailer) or for injury of any kind, including death due to the use of the ball hitch adapter in any manner. The first lot of the FSH is for BETA testing, has no guarantee, and all sales are final.