Lanair DHI 300 - Manual (Page 17)

Section 6 - Fuel Supply Pump/Piping
Visit our website at: www.lanair.com
17
General Requirements
1. Mount the fuel supply pump in a horizontal position (shaft horizontal) near the fuel sup-
ply tank.
2. The oil pump has a maximum suction lift of 14 feet. Suction lift is the length of pipe run
from the bottom of the pick up strainer to the fuel supply pump.
3. The fuel pump/motor are intended for indoor use only.
4. The fuel pump contains an internal strainer that periodically needs to be cleaned. This
internal strainer is mounted behind the pump cover. Before removing the pump cover
make sure you have a new gasket on hand. Contact the Lenan Customer Service
Department for the proper gasket for your model of pump, at 800-753-1601.
5. Install the suction supply line from the inlet side of the fuel pump into the fuel tank
opposite the drain.
6. Install a 1/2” inside diameter (.493) steel pipe, or 1/2” outside diameter copper through-
out the suction supply line and pick up tube. The use of smaller line, or rubber, plastic or
hydraulic line is unsafe and will void your warranty.
7. Use thread sealing compound on all pipe thread connections. Do Not Use Teflon Tape.
8. Install the suction line strainer in the suction line. Make sure the suction line strainer is 6”
off the bottom of the tank. The suction line strainer may be mounted horizontally or ver-
tically. Consider accessibility.
9. Install a 1/2” NPT pipe union between the suction line strainer and the pick up tube to
allow for service on the pick up tube.
10. Install the check valve (arrow facing towards the pump) on the bottom of the pick up
tube.
11. Install a vacuum gauge in the suction line. This gauge will indicate when service is need-
ed on the strainer, pump or connections.
12. Install a 1/2” inside diameter (.493) steel pipe, or 1/2” outside diameter copper from the
fuel by-pass regulator (port marked “O”) to the fuel supply pump. Do not allow this line
to protrude into the tank more that 1” The use of smaller line, or rubber, plastic or
hydraulic line is unsafe and will void your warranty.
13. Do not allow the fuel level in the tank to cover the return line.
Section 13 - Service / Maintenance
QUESTIONS?... Contact Customer Service at 1-800-753-1601 M-F 8:00 am- 4:15 pm CST
36
Oil Pre-Heater Tune -Up
Kit (PN# 9869) Required.
Ref. Part
No. No. Qty. Description
1 8992 1 cartridge heater
2 9813 1 pre-heater face plate
3 9869 6 hex cap screw *
4 9869 4 o-ring 13/16" OD *
5 2901 1 oil block
6 9029 2 fitting
7 9869 2 o-ring 5/16" OD *
8 8498 1 oil gauge
9 7242 1 hex cap screw
10 9869 1 o-ring 1/2" OD *
11 7418 1 washer
12 7109 3 plug
13 9366 1 snap disc assembly
14 7242 1 button hex screw
* contained in tune up kit 9869
Maintenance - OIl Pre-Heater
1. Separate Air Pre-Heater from Oil
Pre-Heater
• Remove o-ring and discard(10).
2. Disassemble Oil Pre-Heater
• Remove o-ring and discard(10).
• Remove six hex cap screws (3)
from face plate (2) and discard.
• Remove oil cartridge heater (1).
• Remove four 13/16"OD o-rings
and discard(4).
• Remove three plugs (12) from oil
block (5)
• Remove hex cap screw (9) from
inside oil pre-heater block and
clean. NOTE: Do not discard (5).