Delavan T90 - Manual (Page 3)

Pump Maintenance
Bearings require no lubrication.
Drain. If pump remains installed on tractor,
remove drain plug to drain pump. If pump has
been removed from tractor, use IN and OUT
ports for draining.
Flush. After use, thoroughly flush pump with clear
water. If available, use a solution of one cup of
ammonia in 10 gallons of water. This will dissolve
most residue remaining in the pump. Drain, let dry,
then flush pump with light lubricating oil.
Store.
Caution: Gasoline, kerosene or fuel oil can attack
materials in pump. Do not use as storing solution.
If pump is to be stored, follow flush with a
50 percent permanent antifreeze solution. Plug ports.
Maximum Recommended Pressure:
100 PSIG (7 Bars)
Maximum Recommended Temperature:
120º F (50º C)
Maximum Recommended PTO Speed:
1250 RPM
Before starting, make sure all air is removed from
pump and lines.
Do not use rusty supply barrels or sandy water.
Caution: Running pump dry can cause exces-
sive heat and damage seals.
Do not start pump before priming. The pump is NOT
self-priming. Be sure suction line and pump are
filled with liquid. Open the pressure regulating and
boom regulating valves to be sure there is no back
pressure on pump. Do not close the discharge line
of the pump unless a means of bypassing the liquid
relief valve has been installed. Pump can then be
started and should prime. To assure ease in prime
and the bleeding of air in pumping system, install
pump so that ports are upright.
Caution: Operating above maximum limits can
damage pump.
Do not operate pump at a PTO speed in excess of
1250 RPM, or a pressure higher than 100 psi (7
bars), or a temperature higher than 120º F (50º C).
Pump Operation
1.
2.
3.
4.
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2.
3.
4.
Figure 2. Dimensions
Figure 3. Torque bar and chain assembly, installed