HEXA

GEAR BOX 58 REAR COVER SHIM SELECTION PROCEDURES A. COUNTER SHAFT (SHIM SELECTION) The control dimension to be maintained between Counter shaft 3 rd gear rear face and housing face rear half is 198 ± 0.1mm. Calculate the shim value as illustrated below:  Let the distance “A” as measured in the step 2 be 200mm  Measure the rear cover depth along with the gasket at counter shaft end. Consider this as “B”, let this depth be 2.30 mm.  Calculate the difference between “A” & “B”. Let it be “C”. C= A – B C= 200 – 2.30 C= 197.7 mm  To maintain the control dimension of 198± 0.1 mm the shim thickness is calculated as below: Thickness of shim to be inserted = 198 – C = 198 – 197.7 = 0.3 mm B. MAIN SHAFT SHIM SELECTION The control dimension to be maintained between Main shaft 2 nd gear Shoulder face front and housing face rear half is 197 ± 0.1 mm. Calculate the shim value as illustrated below  Let the distance “E” as measured in the step 3 be 202mm  Measure the rear cover depth along with the gasket at main shaft end. Consider this as “F”, let this depth be5.50 mm.  Calculate the difference between “E” & “F”. Let it be “G”. G= E – F G= 202 – 5.50 G= 196.5 mm  To maintain the control dimension of 197± 0.1mm the shim thickness is calculated as be- low: Thickness of shim to be inserted = 197 – G = 197 – 196.5 = 0.50 mm