LOWR Lower unit6-59 69J3D11NOTE:• Select the shim thickness (T’4) by using thespecified measurement(s) and the calcula-tion formula.• Measure the taper roller bearing at threepoints to find the height average.2. Install the thrust bearing 4 to the propel-ler shaft 5, and then measure the pro-peller shaft flange and thrust bearingthickness (M7) as shown.3. Calculate the propeller shaft shim thick-ness (T4) as shown in the examplesbelow.NOTE:“A” and “B” are the deviation of the propellershaft housing dimension from standard. The“A” mark a and “B” mark b are stamped onthe propeller shaft housing in 0.01 mm units.If the “A” mark or “B” mark is unreadable,assume that “A” and “B” are zero and checkthe free play when the unit is assembled.Example:If “M6” is 15.73 mm and “M7” is 12.50 mmand “A” is (+6) and “B” is (–5), thenT4 = 29.00 + (+6)/100 – (–5)/100 – 15.73 – 12.50 mm= 29.00 + 0.06 + 0.05 – 15.73 – 12.50 mm= 0.88 mm4. Round the numerals for the propellershaft shim(s) (T4) as follows.Example:If “T4” is 0.88 mm, then the propeller shaftshim is 0.85 mm.If “T4” is 0.90 mm, then the propeller shaftshim is 0.88 mm.5. Calculate and select the propeller shaftshim thickness (T’4) as shown in theexamples below.Example:If “T4” is 0.85 mm, thenT’4 = 0.85 – 0.30 mm= 0.55 mmShimming plate 2: 90890-06701Digital caliper 3: 90890-06704S69J6626Calculation formula 1:Propeller shaft shim thickness (T4) =29.00 + A/100 – B/100 – M6 – M7Calculated numeralat 1/100 place Rounded numeral1, 2 03, 4, 5 26, 7, 8 59, 10 8Calculation formula 2:Propeller shaft shim thickness (T’4) =T4 – 0.30
