MARUI BIG BEAR
Big Bear was made by Tokyo Marui. A Japanese company that now makes
airsoft guns. They also made a 1/24th scale radio controlled
Japanese Ground Self-Defense Forces Type 90 Main Battle Tank that
shoots airsoft BB's.
Originally sold only through
mail order in 1984 as a kit without batteries, radio and charger,
the Big Bear featured a plastic, tub-styled chassis, Mabuchi M480-RS
motor, mechanical speed control and live axle rear suspension as
opposed to an independent setup. Tires were wide, chevron-treaded
implement-styled units and actually comprised the majority of the
Big Bear's suspension. The shock absorbers were simple coilover
units which allowed for limited suspension travel. Coil springs also
served to hold the front bumper in place and absorb impact. The body
was a highly detailed styrene plastic Datsun pickup with driver
figure and "Big Bear" decal set.
Owners of the original version
(v.1) of the Big Bear experienced problems with its differential
gears. This kit used the same gearboxes and gears as the Marui Jeep
CJ (MT-59-RC-7) and the Marui Toyota Landcruiser (MT-59-RC-8) kits
and consisted of 2 large bevel gears, and a gear set of 48 pitch
metric. This proved to be a major problem for the first version of
the Big Bear, as the special black M480RS motor and the large tires
designed for the Big Bear created increased load, causing the
differential gears to break or heat up and melt.
I also replace the mechanical speed controller with an electronic one in this vehicle. I was unable to find the stock wheels and tires, the original ones where all dry rotted, so I went to my local hobby shop and found something I could make work.
I didn't think to take any before
Click on any image for full sized picture.