Chrysler RAM TRUCK 2500 1994 Service Manual page 181

I - 22 POWER BRAKE VACUUM PUMP (DIESEL MODELS)
PUMP ASSEMBLY
LOWER MOUNTING
STEERING
. PUMP
ENGINE BLOCK
J9119-74
Fig. 4 Oil Pressure Sender Location
(8) Remove bottom, inboard nut that attaches
adapter to steering pump (Fig. 6). This nut secures a
small bracket to engine block. Nut and bracket must
be removed before pump assembly can be removed
from block.
ENGINE
BLOCK
VACUUM
PUMP
VACUUM
PUMP
OIL FEED
UNE
J9105-96
Fig. 5 OH Feed Line Connection At Pump
(9) Remove upper bolt that attaches pump assem­
bly to engine block (Fig. 7).
(10) Remove pump assembly from vehicle (Fig. 8).
VACUUM PUMP REPLACEMENT
(1) Remove nuts attaching vacuum pump to
adapter (Fig. 8).
BOTTOM-INBOARD
ADAPTER BRACKET NUT
J9105-97
Fig. 6 Adapter And Pump Mounting Fastener
Location
J9119-76
Fig. 7 Removing Pump Assembly Upper Mounting
Bolt
(2) Remove vacuum pump from adapter (Fig. 9).
Turn pump gear back and forth to disengage pump
shaft from coupling i f necessary.
(3) Inspect adapter O-ring (Fig. 9). Replace O-ring
i f cut or torn.
(4) Lubricate adapter O-ring with engine oil.
(5) Note position of drive slots in coupling. Then
rotate drive gear to align tangs on vacuum pump
shaft with coupling (Fig. 10).