XL-PH10397SG - saf-holland

Operating Conditions/Cushioning Systems
Operating Conditions
Off-Road / Rough Terrain Applications
Reduction in Rated Capacities
For off-road and rough terrain applications, the rated
capacities (MGTW and Maximum Vertical Load) of the
coupling devices for both the tow and towed vehicles
should be reduced by a minimum of 25% to accommodate
the increase in dynamic loading.
Example – A pintle hook rated at 100,000 lbs. (45,360 kg)
MGTW and 20,000 lbs. (9,070 kg) maximum vertical load
would, for off-road applications, be rated at 75,000 lbs.
(34,020 kg) MGTW and 15,000 lbs. (6,800 kg) Maximum
Vertical Load.
Articulation
Maximizing the range of articulation between the drawbar
eye of the trailer and the coupling device of the tow vehicle
is critical for good off-road performance. Holland pintle
hooks are designed for maximum articulation with Holland
drawbars. Other considerations include:
• A swivel-mount coupler/pintle hook or swivel-mount
drawbar can further enhance articulation in offroad
applications. The swivel-mount feature provides
rotation to help prevent binding between the drawbar
eye, coupler or pintle hook. Note however that you
should never use a swivel-mount coupler/pintle hook
with a swivel-mount drawbar. The two swivel-mount
components could lead to over-rotation of the coupling
device.
• It is important to coordinate the size of the drawbar
eye with the mating component of the coupler or pintle
hook. Proper sizing will allow for optimum articulation
of the coupling system when driving over uneven
terrain. Reference Drawbar Compatibility Chart on pages
42 – 43 for assistance in the selection process.
Cushioning Systems
Holland cushioning (shock absorption) systems include:
• Rubber Mount
Absorbs shock loads from hard coupling, vehicle launch
and braking (reference Holland products PH-990,
DB-1407-S, and DB-1407-SE).
PH-990ST71
• Steel Spring
Absorbs shock loads during vehicle launch and
acceleration (reference Holland products PH-30SA and
PH-30SB).
PH-30SA41
DB-1407-S
• Pneumatic Snubber
For vehicles equipped with air systems, a snubber
with force supplied by an air service chamber helps to
minimize ‘free play’ or ‘slack’ between the drawbar eye
and coupling device as well as absorbing shock loads
during deceleration and braking (Reference Holland
products PH-210, PH-300(R), PH-310, PH-400(H), PH-
410, PH-419, PH-550, and DB-1400AC).
PH-775SL11 NoLube
PH-210
DB-1400AC
DB-610-30
XL-PH10397SG-en-US Rev C 02-2013
Amendments and errors reserved. © SAF-HOLLAND, Inc.
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