Disassembling The Oil Pump; Reassembly Of Oil Pump - York YDHF-39 Manual

DISASSEMBLING THE OIL PUMP

Before disassembling the pump, notice
the location of the match marks on the
pump cover and housing. The match
marks must line up when reassembling
the pump.
To remove the oil pump, proceed as follows:
1. Remove the eight cap screws (four long screws
marked "X" and four short screws marked "Y")
from the face of the oil pump cover. (Refer to Fig.
74)
2. Remove the drive gear assembly by screwing the
inner pump gear puller screw (10-24 UNC x 1-1/2
lg.) supplied with the pump kit, into the tapped hole
in the drive gear. (Refer to Figs. 74 and 75). After
the screw is in place, hold screw and gently pull the
gear from the key and hold the shaft.
3. Remove the key from the shaft. (Refer to Fig. 73,
Detail B)
4. To remove the pump housing, pull loose from the
motor and slide over the motor shaft.
15761
PUMP COVER ASSEMBLY
FIG. 74 – REMOVING OR REPLACING
PUMP COVER CAP SCREWS
YORK INTERNATIONAL

REASSEMBLY OF OIL PUMP

LONG CAP
SCREWS
MARKED "X"
SHORT CAP
SCREWS
MARKED "Y"
FIG. 75 – SCREWS AND COVER ASSEMBLY
1. Clean all parts of pump with approved safety sol-
vent, using great care to eliminate all dirt. Lubricate
all parts with clean YORK refrigerant oil. To reas-
semble, proceed as follows:
2. Lubricate the motor shaft with refrigerant oil. Posi-
tion housing in place over the motor shaft and against
the motor housing. The pump housing match mark
must be on one side of the motor. Line the pump
housing screw holes up with the screw holes in the
motor housing.
3. Lubricate the shaft key and place it in the keyway
on the shaft.
4. Lubricate the drive gear. Slide the gear over the
shaft, line up the keyway with the key and drive
gear. Push the drive gear into place.
5. Lubricate the drive gear and place it into the cavity
of the oil pump housing.
6. Lubricate the face and the Teflon-coated shaft bear-
ing of the cover assembly. Locate the cover as
shown in Fig. 78 and gently slide onto the end of the
shaft. Line up holes and place "X" long screws and
"Y" short screws in their proper holes according to
Fig. 60. Tighten the "X" long screws in a 1, 3, 2, 4
sequence. Tighten the "Y" short screws in a 5, 7, 6,
8 sequence. Torque screws to 15 ft. lbs., using the
alternating tightening method.
PUMP
NO. 10 – 24 UNC
HOUSING
DRIVEN
GEAR
LONG
SCREWS
MARKED "X"
FORM 160.49-M1
LUBRICATION
PORT FOR
SHAFT BEARING
TEFLON COATED
SHAFT BEARING
SHORT
SCREWS
MARKED "Y"
15760
39
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