Doosan D50S-5 Operation & Maintenance Manual page 195

Typical Example Typical Example
1. 1. Turn the radiator cap slowly to relieve the Turn the radiator cap slowly to relieve the
pressure, then remove the cap. pressure, then remove the cap.
2. 2. Remove the block drain plug. Remove the block drain plug.
Fork – Inspect Fork – Inspect
Forks should be inspected, at a minimum, every 12 Forks should be inspected, at a minimum, every 12
months. If the truck is being used in a multi-shift or months. If the truck is being used in a multi-shift or
heavy duty operation, they should be checked every heavy duty operation, they should be checked every
six months. six months.
1. 1. Inspect the forks carefully for cracks. Special Inspect the forks carefully for cracks. Special
attention should be given to the heel section (A), attention should be given to the heel section (A),
all weld areas and mounting brackets (B). all weld areas and mounting brackets (B).
5. 5. Start and run the engine for 30 minutes. Start and run the engine for 30 minutes.
6. 6. Stop the engine and drain the cleaning solution. Stop the engine and drain the cleaning solution.
7. 7. Flush the system with clean water, until draining Flush the system with clean water, until draining
water is clear. water is clear.
8. 8. Close the drain valve and install the block drain Close the drain valve and install the block drain
plug. Fill the system with neutralizing solution, plug. Fill the system with neutralizing solution,
250 g (1/2 lb) sodium carbonate per 40 liters (10 250 g (1/2 lb) sodium carbonate per 40 liters (10
gallons) of water. gallons) of water.
9. 9. Start and run the engine for 10 minutes. Start and run the engine for 10 minutes.
10. Stop the engine and drain the neutralizing 10. Stop the engine and drain the neutralizing
solution. solution.
11. 11. Flush the system with clean water until draining Flush the system with clean water until draining
water is clear. water is clear.
12. 12. Close the drain valve and install the block drain Close the drain valve and install the block drain
plug. Add coolant to the top of the filter neck. plug. Add coolant to the top of the filter neck.
13. Start and run the engine to stabilize the coolant 13. Start and run the engine to stabilize the coolant
level. See topic, "Coolant level - Check" in level. See topic, "Coolant level - Check" in
"Every 10 Service Hours or Daily". "Every 10 Service Hours or Daily".
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3. 3. Check the straightness of the upper face of Check the straightness of the upper face of
blade (D) and the front face of shank (E) with a blade (D) and the front face of shank (E) with a
straight edge. straight edge.
The fork should be withdrawn from service if the The fork should be withdrawn from service if the
deviation from straightness exceeds 0.5 percent deviation from straightness exceeds 0.5 percent
of the length of the blade and/or the height of the of the length of the blade and/or the height of the
shank respectively 5 mm/1000 mm (0.18"/36"). shank respectively 5 mm/1000 mm (0.18"/36").
Maintenance Section Maintenance Section