LANCE
II SERVICE
MANUAL
a. Discard all O-rings.
b. Remove caps or plugs and clean
all components with a dry type cleaning
solvent and
dry thoroughly.
c. Inspect pump
components for scatches, scores,
chips, cracks and wear.
d. Inspect
motor for worn
brushes (minimum
of .218 brush remains
between the braided
wire and commutator
end), excess wear and excess
bearing wear.
e. Repairs are limited
to O-ring and brush replacement
as follows:
1. One brush
holder has the winding
wire attached.
Locate this
wire and remove by
using a soldering gun.
2. The head
assembly can
now be removed
and worked on for
ease of brush replace-
ment
if required.
3. Remove brush
wire and brush from by-metal
heat protector.
4. Solder
new brush wires to head assembly
and by-metal heat protector, and wire
from winding
to one brush
holder.
5. Install brush
springs and brushes into brush
holders and secure in place
(temporary) with a
piece of string looped around the brush
and holder and tied in a knot.
NOTE
Insure that the braided
wire is in the holder
slot for proper
brush movement.
6. Install
the head
assembly
with new
brushes to
the frame
and commutator
in
accordance with instructions given in Paragraph 6-8, Step a.
6-8. ASSEMBLY OF HYDRAULIC
PUMP. (Refer
to Figure 6-3.)
a. The pump
motor may be
assembled and installed
on the reservoir
as follows:
1. Position
motor
frame
(9) on
reservoir
(13).
Note aligning
marks
on frame
and
reservoir.
2.
Place thrust
washers (11),
of the same
amount
removed, on
the drive
end of the
armature (8).
3.
Lubricate
the entire length
of the
armature shaft,
on the drive
end, with
light grease
to prevent
O-ring seal from damage.
Insert end of shaft in reservoir.
4. Saturate
felt oiling
pad around
commutator
end bearing
with SAE
20 oil. Allow
excess oil
to drain off before assembling
motor.
5.
Insert thrust
ball (7) in
bearing of
motor head
(1). To hold
ball in position,
place
a
small amount of grease inside the bearing.
6. Place head
assembly on frame
and allow brushes
to extend over
commutator.
Remove the
string securing
the brushes in the
holders. Push head
assembly on frame
and
insure
proper
indexing of
head and frame
assemblies.
Secure in
place with
thru bolts (4).
7. Check
freedom
of rotation
and end play
(thrust)
of the armature
within
the
assembly. A
minimum of
.005 inch end
play is permissible.
Adjust
to this tolerance
if necessary
by adding
or removing
thrust
washers (11)
on drive
end of armature
shaft.
b. Assemble
valve
and gear
case (15)
to the reservoir
(13)
as follows:
1. If
removed,
place pump
gears
in valve
and gear
case and
install cover.
Install
cover
attaching bolts and secure.
2. Lubricate
reservoir
seal ring
(14) with hydraulic
fluid
(MIL-H-5606A)
and place
in
recess provided in case (15).
3. Position
reservoir
(13)
on valve
and gear
case (15).
Care
should
be taken
when
aligning the
armature shaft with
the pump gear.
Do not run the motor
to accomplish
this.
Revised:
9/2/78
HYDRAULIC
SYSTEM
1H20
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