6-52 673831-Rev A
HYDRAULICS
6
Figure 6-55
1. After removing bolts, disassemble pump, one section
at a time. Before removing gear set, mark a line
across meshing teeth to ensure that gears are
reassembled in the same position.
2. Place parts in assembly order, on a clean work area
as they are removed.
3. Discard seals as they are removed.
4. Clean all parts using clean solvent and dry using
compressed air.
5. Inspect all parts for wear or damage. Replace the
gear pump as a unit if any parts other than seals
require replacement.
Assembly Notes
• Assemble the gear pump by reversing the order of
disassembly.
• Use a new seal kit during assembly.
• Apply a coat of clean hydraulic oil to all parts to ease
assembly.
• Use extreme care when installing shaft seal. Seal
must seat squarely in seal bore. Use caution not to
damage seal when installing pump input shaft.
• As an assembly aid, install two studs in front flange
to align pump sections. Remove the studs after the
first two screws (10) are assembled.
• Assemble pump one section at a time, building up
from front flange section.
• Remove alignment mark from gear sets after gears
have been installed with teeth in proper mesh.
• Rotate drive shaft by hand after assembling each
section to make sure there is no binding between
parts; do not force.
• Install retaining bolts finger-tight and rotate drive
shaft to make sure it turns freely. Tighten bolts evenly
in steps to a final torque of 33 lb-ft (45 N·m) and
check rotation of pump drive shaft.
• Lubricate pump through ports with clean hydraulic oil
prior to installing.
It is important that all components are absolutely
clean, as contamination can result in serious
damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air.
It is important that all component parts are
absolutely clean, as contamination can result in
serious damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air.
Required Materials
Seal Kit (Jacobsen PN 5003036)
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