Doosan G643 LP Engine — DOOSAN G643 LP Engine Service Manual PDF Download (EN)

B . Pull the camshaft out from the block being careful to prevent damage to the camshaft bearings. Figure 12-13 Timing Chain and Sprockets Remove or Disconnect 1 . Camshaft sprocket bolts. 2 . Camshaft sprocket and camshaft timing chain together. IMPORTANT: The sprocket has a light inter- ference fit on the camshaft. Tap the sprocket on its lower edge to loosen it. 3 . Balance shaft drive gear. Camshaft Removal Figure 12-14 Remove or Disconnect 1 . Camshaft retainer bolts and camshaft retainer. 2 . Camshaft. A . Install three 5/16 - 18 bolts 100 - 125 mm (4- 5 in.) long into the camshafts threaded holes. Use these bolts to handle the camshaft (figure 12-14).

Figure 12-14 Removing Camshaft Balance Shaft Removal Figures 12-15 through 12-17 Tools Required: J 38834 Balance Shaft Bearing Service Kit J 36996 Bearing Remover Remove or Disconnect 1 . Bolt. 2 . Driven gear. 3 . Retainer bolts. 4 . Retainer. 5 . Balance shaft using a soft faced hammer (figure 12-16). 6 . Balance shaft rear bearing using J 38834 and J 36996 (figure 12-17). G643 (E) Service Manual Chapter 3. Engine Mechanical System 68