So the "old school Case guys" still wouldn't use their brakes - unless they really had too. Given time, these lip type seals begin to not work as efficiently & leak a little - but much more the the range clutch packs did - with the consequence of losing braking efficiency, & dropping some transmission oil pressure during application. However, the range clutch packs, used piston seals that were designed to leak a little during application - the piston seals in the brake housings were a different design, a lip type seal that could seal 100%. This brake design was a vast improvement & allowed the operator to feather the pedals to make small direction adjustments, while still applying full power from the engine. The 1150B & later model brakes, used the same clutch plates as the rest of the transmission - basically creating 2 more clutch packs - eliminating the use of seperate brake master cylinders / linkages & expanding actuating discs. ġ150 transmissions from the B model used wet brakes - this transmission design is very different from 450 850.
Since you mentioned your friend had an 1150, I'll stick to discussing 1150's from here onwards.
#450C CASE DOZER MANUALS#
While Operator Manuals never really said to avoid using them for steering, it was found that if you did use them for steering, the brakes would wear out very quickly, wearing/stripping splines on the discs, wearing out housings, creating excessive heat to harden pinion seals - allowing leaking oil onto the dry brake linings - let's not forget to mention the PITA job it is to actually repair brakes on the smaller 450/850īasically, this all created extra repair grief/expense - so owners & operators of these old "Case" machines abide by this unwritten law - "You steer your Case Crawler using the levers only". The brakes on the early crawler models (up to about 1980) were dry friction discs. The transmissions in Case crawlers (4) are powershift - meaning you can change range & even direction on newer models with a minimum amount of deceleration required. Being a long term Case Equipment repair guy, I'll tell you how I think this thinking came about.
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