Changes in snowplow-mounting guidelines
Oct 13, 2009 9:36 AM, BY RICK WEBER
The most significant changes in the manufacturers' guidelines for snowplow mounting for the 2010 model year come from Dodge.
Chris Borczon, chassis engineer for Dodge Trucks’ commercial vehicle team, said the new front end will require slight changes to the bracketry, necessitated by all-new sheet metal, a new upright front grille, and a change in the diesel heat exchangers, which grew larger and “essentially get into the space” where the snowplow brackets attach.
“It appears that while some of the bracketry designed for 2009 and earlier Dodge Trucks will not carry forward, the manufacturers are revising or modifying their existing brackets to allow them to be backwards compatible,” Borczon says. “The new 2010 brackets will work on 2009 and earlier Dodge truck models.”
He says that while the 2500 and 3500 pickup trucks will have the new cab design that includes new front-end body components for 2010, the 3500, 4500, and 5500 chassis cab models will maintain the same body and chassis as the 2009 models for the first quarter of 2009 (until December 31).
These models will be called 2010 model chassis cabs. In April of 2010, production of chassis cabs with the new body style will start. These trucks will be called 2011 models.
Ken Tyburski, Ford’s supervisor of product information for special vehicle engineering, said ratings are similar, except for a small change on the F-450 4x4 chassis cab. Also, in regards to snowplow models, the F-350 DRW 4x4 pickups with 156.2" wheelbase in a Crew Cab are no longer available.
Also, F-350 DRW 4x4 13,000-lb GVWR 185.8" wheelbase chassis cab Super Cabs (84" CA) and F-350 DRW 4x4 13,000-lb GVWR 200.2” wheelbase (84" CA) chassis cab models are no longer available. Mountings for both F-Series Super Duty and F150s are carryovers.
GM’s Ken Joye said “it’s safe to say there won’t be any changes” for 2010.
The following list is for quick reference only. For a comprehensive list of the specific guidelines for each model, refer to the body builders book published by the truck manufacturer.
GM recommends that when a snowplow is mounted on a vehicle, only one passenger should accompany the driver. More than one passenger may exceed front Gross Axle Weight Ratings.
Prior to installing a front-mounted snowplow, the following process should be followed and necessary information obtained:
- Establish vehicle curb weight.
- Establish chassis manufacturer’s front and rear axle weight ratings.
- Chevrolet and GMC truck dealers can provide availability, specifications, GVWR, and Front and Rear GAWR. For vehicles already built, this information can be found on the certification label installed on the driver’s door/frame or provided on the cover of the Incomplete Vehicle Document.
- The following information should be obtained and provided by the manufacturers of snowplows and salt spreaders:
- Specifications, weights, and center of gravity data.
- Vehicle installation guidelines and instructions.
- Calculation of weight distribution for the front and rear axles.
- The loaded vehicle with driver, passenger, aftermarket accessories, snowplows, spreader, and cargo must not exceed the GVWR, and Front and Rear GAWR.
In addition, the completed curb weight vehicle, with all installed aftermarket accessories, snowplow, and spreader, and with 400 lb distributed in the driver-passenger area of the vehicle, must have a center of gravity that is located within the trapezoid formed by the coordinates A, B, C, D, H1 and H2, plus it must be to the rear of vertical line E and forward of vertical line F as defined in the Allowable Center of Gravity charts. If the center of gravity does not fall within the specified trapezoid, ballast weight may be required to shift the center of gravity until it falls within the specified trapezoid.
The snowplow manufacturer and the installer of the aftermarket equipment should determine the amount of rear ballast required to ensure that the vehicle, with the attached snowplow and aftermarket equipment, complies with the Allowable Center of Gravity Trapezoid and the resulting front and rear weight distribution ratio as defined in the Allowable Center of Gravity Charts published in the GM manual.
The use of rear ballast weight may be required to prevent exceeding the GAWR of the front axle. The use of rear ballast weight may be required to ensure that the center of gravity location of the completed vehicle, with the attached snowplow and other installed equipment, complies with the Allowable Center of Gravity Trapezoid and the resulting front and rear weight distribution ratio, even though the actual front weight may be less than the GAWR of the front axle. In either case, the rear ballast weight should be securely attached in the cargo box or behind the rear axle of the vehicle in a manner that prevents it from moving during driving and stopping.
To help avoid personal injury, refer to Z-height setting procedure before adjusting torsion bars. If torsion bars are adjusted for aftermarket equipment, be sure to return them to specification when the equipment is removed. Otherwise, a front shock absorber may dislodge and damage a front brake line. This could result in an accident when minimum stopping distances are required.Ford Trucks
Minimum recommended equipment for the F-150: regular cab 4x4, 144.5” wheelbase, 8’ pickup box; or SuperCab 4x4, 163” wheelbase, 8’ pickup box.
Snowplow prep package (option code 63A) includes FGAWR upgrade to 4300 lb (4300 lb spring rating).
Heavy Duty Payload package (option code 627) includes: 8200-lb GVWR; 4050-lb FGAWR (4050-lb spring rating); 4800-lb RGAWR (4900-lb spring rating); rear axle capacity upgrade to 5300 lb and 10.5” diameter ring gear 4.10 ratio, limited-slip not included but available; 17”x7.5” J 7-lug steel wheels; LT245/70Rx17D BSW all-season tires (5); 5.4L, 3-valve V8 engine, 4R75E automatic transmission; Super Engine Cooling (1.42” core thickness); auxiliary transmission air cooler, oil-to-water increased to 9-channel/18-plate; battery upgrade to 72 amp-hr/650 CCA; fuel tank (35.7-gallon capacity).
Snowplow weights (maximum recommended):
- Regular Cab 750 lb (700 lb removable plow assembly plus 50 lb permanently attached hardware).
- SuperCab 610 lb (560 lb removable plow assembly plus 50 lb permanently attached hardware). These snowplow weight limits are based upon a vehicle built with maximum buildable Ford option content, driver plus one front seat passenger, 150 lb each, 800 lb of ballast weight rearward of the rear axle, and additional assumptions for commercially available snowplow assembly weights and mounting location.
The vehicle must not be operated when overloaded. A vehicle is overloaded when the weight of the completed vehicle with aftermarket equipment installed, plus driver, passengers, and cargo, exceeds either the FGAWR, RGAWR, or GVWR established by Ford Motor Co and displayed on the Safety Compliance Certification Label.
The addition of ballast weight placed rearward of the rear axle may be required to prevent exceeding FGAWR, and provide good vehicle braking and handling. The ballast should be attached securely to the vehicle with consideration for the normal driving dynamics of snowplowing and occupant safety in accidents.
For Ford completed vehicles of 10,000 GVWR or less, the weight of permanently attached aftermarket equipment must not exceed the Total Accessory Reserve Capacity displayed on the Safety Compliance Certification Label to maintain the compliance representation that came with the Ford-built vehicle. Exceeding TARC will require recertification. This applies only to the permanently attached equipment, such as the snowplow frame mounting hardware, and not to the removable portion of the snowplow blade assembly.
Front end wheel alignment (toe) and headlight aim may require readjustment after installation of snowplow equipment. Failure to reset front wheel alignment may cause premature uneven tire wear. If required, reset to chassis manufacturer’s specifications found in the Ford Shop Manual.
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