CleaverBrooks CBLE, Operation And Maintenance Manual

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Inspection and Maintenance
8-20 750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
11.
Replace the gasket, put the support in place, and secure all fastenings.
12.
Replace the metering stem and spring. Lightly lubricate the stem to facilitate insertion and easy movement. Use
care when inserting so that the orifice and the stem are not damaged.
13.
Snug the packing gland, but only sufficiently to place slight tension on the packing. The stem must move freely
from the force of the spring.
14.
Work the stem up and down several times to ensure that it moves freely.
15.
Depress the valve stem and replace the cam. Mate the match-marks and secure the setscrews. Be sure the cam
spring is centered in the roller.
16.
Restore oil flow. Test fire the burner at various firing rates being certain that the metering stem freely follows
the cam.
17.
Tighten the packing gland after a period of operation, if necessary, to maintain proper tension on the packing.
Do not over tighten.
If there are indications that the oil metering valve has become clogged at its orifice, it will be necessary to disassem-
ble the control to remove the obstruction. Clean the slotted stem of the oil metering valve with suitable solvent and
blow-dry with an air line. Follow the procedure outlined above when removing or reinstalling the metering valve
stem. Also check all fuel line strainers.
Should a pressure adjusting or relief valve become clogged, disassemble by releasing the locknut and backing off
the screw to relieve tension on the diaphragm. Remove the valve cover and the diaphragm to expose any dirt or
foreign material which may have entered the valves. The diaphragms should be replaced annually.
8.19 — Air Pump and Lubricating System
8.19.1 — Air Compressor
The air pump requires little maintenance. However, the life of the pump is dependent upon a sufficient supply of
clean cool lubricating oil. The oil level in the air-oil tank must be observed closely. Lack of oil will damage the
pump making replacement necessary. Disassembly or field repairs to the pump are not recommended.
8.19.2 — Lubricating Oil
Lubricating oil must be visible in the gauge glass at all times. There is no specific level required as long as oil is vis-
ible. Do not operate if oil is not visible.
Oil with proper viscosity must be used. SAE 20 detergent is recommended, although SAE 10 detergent is also per-
missible.
When adding oil:
1.
Remove the cover from the fill pipe and add oil through the conical strainer in the pipe with the unit running.