Series 638 – Section 3.8 Oil Dipstick Assembly

Section 3.8
Oil Dipstick Assembly

A steel ribbon-type oil level dipstick is used to check the level of lubricating oil in the engine oil pan. The dipstick is located in a tube attached by a threaded adaptor on the cylinder block to an opening in the oil pan. See Figure "Oil Dipstick Assembly Parts Location" .‪

1.Turbocharger Oil Drain Fitting‪	3.Oil Dipstick Tube‪
2.Copper Washer‪	4.Oil Dipstick‪

Figure 1. Oil Dipstick Assembly Parts Location

Check the oil level after the engine has been stopped for a minimum of 20 minutes to permit oil in the various parts of the engine to drain back into the oil pan.‪

NOTICE:

Maintain the oil level between the full and low marks on the dipstick. Never allow it to drop below the low mark. No advantage is gained by having the oil level above the full mark. Overfilling may cause the oil to be churned by the balance shafts and crankshaft throws, causing foaming or aeration of the oil. Operation below the low mark may expose the pump pickup, causing aeration, loss of pressure and engine damage.‪

Dipsticks are normally marked for use only when the equipment the engine powers is on a level surface. Improper oil levels can result if the oil level is checked with the equipment on a grade, or if insufficient time is allowed for oil to drain back to the sump. ‪

Section 3.8.1
Replacement of Oil Dipstick Assembly

To determine if replacement of the oil dipstick assembly is necessary, perform the following procedure. See Figure "Flowchart for Replacement of Oil Dipstick Assembly" .‪

Figure 2. Flowchart for Replacement of Oil Dipstick Assembly

Section 3.8.2
Removal of Oil Dipstick Assembly

Remove the oil dipstick as follows:‪

1. Remove the oil dipstick from the oil dipstick assembly. See Figure "Removal of Oil Dipstick Assembly" .
   

   1.Turbocharger Oil Drain Fitting‪	3.Oil Dipstick Tube‪
   2.Copper Washer‪	4.Oil Dipstick‪

   Figure 3. Removal of Oil Dipstick Assembly

2. Remove the oil dipstick tube and copper washer.

Section 3.8.3
Cleaning of Oil Dipstick Assembly

Clean the oil dipstick assembly as follows:‪

1. Clean the oil dipstick assembly and related parts with clean fuel oil.

   To avoid personal injury when blow drying, wear adequate eye protection (safety glasses or face plate) and do not exceed 276 kPa (40 lb/in. 2 ) air pressure.‪

2. Dry oil dipstick assembly and related parts with compressed air.

Section 3.8.3.1
Inspection of Oil Dipstick Assembly

Inspect the oil dipstick assembly as follows:‪

1. Visually check the oil dipstick for cracks or bends.
   1. If the oil dipstick has been cracked or bent, replace the component. Refer to "3.8.4 Installation of Oil Dipstick Assembly" .
   2. If the oil dipstick has not been cracked or bent, proceed with step 2 of inspection.
2. Visually check the oil dipstick tube for cracks or physical damage.
   1. If the oil dipstick tube has been cracked or physically damaged, replace the component. Refer to "3.8.4 Installation of Oil Dipstick Assembly" .
   2. If the oil dipstick tube has not been cracked or physically damaged, reuse the component. Refer to "3.8.4 Installation of Oil Dipstick Assembly" .

Section 3.8.4
Installation of Oil Dipstick Assembly

Install the oil dipstick assembly as follows:‪

1. Install the copper washer and oil dipstick tube into the cylinder block. See Figure "Installation of Oil Dipstick Tube" .
   

   1.Turbocharger Oil Drain Fitting‪	3.Oil Dipstick Tube‪
   2.Copper Washer‪	4.Oil Dipstick‪

   Figure 4. Installation of Oil Dipstick Tube

2. Insert the oil dipstick into the oil dipstick tube.
3. Run engine to verify repair.