LOWR Lower unit6-29 69J3D112. Calculate the forward gear shim thickness(T1) as shown in the examples below.NOTE:“F” is the deviation of the lower case dimen-sion from standard. The “F” mark a isstamped on the trim tab mounting surface ofthe lower case in 0.01 mm units. If the “F”mark is unreadable, assume that “F” is zeroand check the backlash when the unit isassembled.Example:If “M1” is 29.10 mm and “F” is (+5), thenT1 = 29.50 + (+5)/100 – 29.10 mm= 29.50 + 0.05 – 29.10 mm= 0.45 mm3. Select the forward gear shim(s) (T1) asfollows.Example:If “T1” is 0.45 mm, then the forward gearshim is 0.42 mm.If “T1” is 0.60 mm, then the forward gearshim is 0.58 mm.Selecting the reverse gear shims1. Turn the ball bearing 1 two or threetimes, and then measure the bearingheight (M2) as shown.NOTE:• Select the shim thickness (T2) by using thespecified measurement(s) and the calcula-tion formula.• Measure the reverse gear at three points tofind the height average.2. Calculate the reverse gear shim thick-ness (T2) as shown in the examplesbelow.Calculation formula:Forward gear shim thickness (T1) =29.50 + F/100 – M1Calculated numeralat 1/100 place Rounded numeral1, 2 03, 4, 5 26, 7, 8 59, 10 8Available shim thicknesses:0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and0.50 mmShimming plate 2: 90890-06701Digital caliper 3: 90890-06704
