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10
AIR OUTPUT, AIR INTAKE, AND LINT
FILTERS
1. Remove upper shell (see page 8).
2. Remove filter end cover screws using 5/16" nut-driver.
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (see Preventative Maintenance
Schedule, page 6).
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT:
Do not oil filters
PUMP PRESSURE ADJUSTMENT
1. Remove pressure gauge plug and plastic cap (GK20 only) from
filter end cover.
2. Install accessory pressure gauge (part number HA1180).
3. Start heater (see Operation, page 5). Allow motor to reach full
speed.
4. Adjust pressure. Turn relief valve to right to increase pressure.
Turn relief valve to left to decrease pressure. See specifica-
tions below for correct pressure for each model.
5, Remove pressure gauge. Replace pressure gauge plug and plas-
tic cap (GK20 only) in filter end cover.
Figure 13 - Air Output, Air Intake, and Lint Filters, Model GK20
SERVICE PROCEDURES
Continued
Air Intake Filter
Lint Filter
Filter End
Cover
Air Output
Filter
Fan Guard
Air Intake
Filter
Filter End
Cover
Lint Filter
Air Output
Filter
Figure 14 - Air Output, Air Intake, and Lint Filters, Model GK30
Fan
Guard
Figure 15 - Pressure Gauge Plug and Plastic Cap Removal
Pressure
Gauge
Plug
Pressure
Gauge
Figure 16 - Adjusting Pump Pressure
Pump
Pressure
Model (PSI/Bar)
GK20 4.9/0.338
GK30 4.9/0.338
Relief
Valve
Plastic Cap
SERVICE PROCEDURES