Sterlco Midsize - Manual (Page 41)

Portable Hot Oil Temperature Control Units Page 41
3. Coat idler pin with non-detergent SAE 30 weight oil and place idler
and bushing on idler pin in head. If replacing with carbon graphite
bushing, Refer to Installation of Carbon Graphite Bushings, page
50.
4. Using a .010 to .015 inch head gasket, install head and idler
assembly on pump. Pump head and casing were marked before
disassembly to insure proper reassembly. If not, be sure idler pin,
which is offset in pump head, is positioned toward and equal
distance between port connections to allow for proper flow of liquid
through pump. Tighten head capscrews evenly.
5. Place the mechanical seal installation tapered half rings over the
shaft and apply P-80 oil supplied with the replacement seal, grease is
not recommended on the sleeve and rotor shaft. Slide the rotating
portion of the mechanical seal on the shaft until it bottoms on the
shaft step. See FIGURE 6. Remove the seal installation tapered
half rings. It is important when using the rings to make sure the thin
edge is facing the direction of the shaft end, and that the thick end is
facing the rotor.
6. Apply lubricant to the seal seat o-ring and push it in the bracket.
Note the shinny side of the seat goes towards the carbon graphite
seal face.
7. Apply Dow Corning #44 high temperature silicon grease to the lip
seal area in the seal gland and install on the shaft. Install the seal
gland plate and secure with two nuts.
8. Pack ball bearing with Dow Corning #44 high temperature silicon
grease and install in the thrust bearing housing. Place bearing spacer
collars inside the lip seals. Thread the end cap into the bearing
housing and tighten with a spanner wrench. Tighten the radial set
screws that lock the end cap in place.
9. Using the snap ring pliers, install the snap ring onto the shaft.
10 Thread the thrust bearing assembly into the bracket. Turn in until
hand tight. This forces the rotor against the head.
11. Put lockwasher and locknut on shaft. Insert length of hardwood or
brass through port opening between rotor teeth to keep shaft from
turning. Tighten locknut to 50 – 70 ft.-lbs. torque and bend one tang
of lockwasher into slot.
12. Adjust pump end clearance. Refer to section on Thrust Bearing
Adjustment.
13. Lubricate all grease fittings with Dow Corning #44 high
temperature silicon grease.