Great-plains NP4000B Operator Manual User Manual Page 134

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130 2013+ NP4000/A/B Table of Contents Index Great Plains Manufacturing, Inc.
417-199M Table of Contents Index 2014-05-14
Pump Maintenance and Repair
Ace Hydraulic Pump
The Ace pump is designed for long life and service.
Through the years, it may be necessary to replace the
mechanical seal or service components of the pump.
A mechanical seal may weep slightly, but if it starts to
drip, the pump will have to be disassembled. Before
disassembly, be sure to wash it out with fresh water.
If the pump leaks, before removal from applicator, run
the pump with adequate water in tank to diagnose the
actual pump problem.
Refer to the Ace Pump Instruction manual (HYD-MAN)
for disassembly instructions.
Coulter Disc Replacement
22 Inch Coulters
Replace 22 in. (56 cm) coulter blades when adjusting
application depth and/or applicator level becomes
difficult. Signs that blade replacement is indicated are:
Coulter blade diameter is close to, or below,
20 in. (51 cm).
Height adjustment, when level, requires no lift-assist
spacers (page 43).
Tine height adjustment is at the upper limit (page 86).
See page 147 for replacement blades.
20 Inch Coulters
Replace 20 in. (51 cm) coulter blades when adjusting
application depth and/or applicator level becomes
difficult. Signs that blade replacement is indicated are:
Coulter blade diameter is close to, or below,
18 in. (46 cm).
Height adjustment, when level, requires no lift-assist
spacers (page 43).
Fertilizer arm adjustment is at the upper limit
(page 89).
See page 148 for replacement and alternate coulter
blades.
Figure 86
Ace Pump Parts
31965
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