Carrier 69NT40-511-199, 69NT40-521 manual Oil Pump and Bearing Head, Low Profile Gear Oil Pump

Set screw must be removed. 1

			11
	5	6	10
	4
2	3
			9
1
		7	8

5

2

4 3

1. Oil Pump & Bearing Head

2. Thrust Washer

3. Oil Pickup Tube

4. Oil Inlet Port

5. Oil Pump Inlet

Figure 6-8. Oil Pump and Bearing Head

If it was determined that the oil pump is not operating properly, the entire oil pump and bearing head assembly must be replaced. Replacement parts for the pump are not available. However, in the event the pump requires inspection or cleaning, disassemble and reassemble by referring to Figure 6-9. Clean all parts and coat all moving parts with compressor oil before proceeding with reassembly.

g.Be very careful not to damage the motor windings when removing the motor end cover, as the cover fits over the winding coils. Remove all capscrews except one in the top of the cover. Then, while holding the cover in place, remove the remaining capscrew. Do not allow the cover to drop from its own weight. To prevent striking the winding, remove the cover horizontally and in line with the motor axis.

h.Remove the refrigerant suction strainer. If it is removed with ease it may be cleaned with solvent and replaced. (See Figure 6-10.) If the strainer is broken, corroded or clogged with dirt that is not easily removed, replace the strainer. Install new gaskets upon reassembly.

i.Block the compressor crankshaft so that it cannot turn. Use a screwdriver to bend back the tabs on the lockwasher and remove the equalizer tube. (See Figure 6-12.) The slinger at the end of the shaft draws vapor from the crankcase. It may discharge through a tee or a single equalizer tube.

1.Capscrews

2.Cover

3.Reversing Assembly

4.Pinion

5.Gear

6.Drive

7.O-Ring

8.Oil Pump & Bearing

9.Set Screw

10.Relief Valve

11.Pin

	Figure 6-9. Low Profile Gear Oil Pump
9	8	7	6	3

1

2

5

4

1.Valve Capscrew

2.Suction Service Valve

(Used on single-speed compressor)

3.Valve Gasket

(Used on single-speed compressor)

4.Suction Service Valve

(Used on two-speed compressor)

5.Valve Gasket

(Used on two-speed compressor)

6.Motor End Cover

7.Motor End Cover Gasket

8.Suction Strainer

9.Strainer Screws and Washers

Figure 6-10. Motor End Cover

j.If the piston rings extend beyond the cylinder tops, the pistons can be pulled through the bottom plate

SECTION 6

6-11 T-268-07