Lubrication Systems; Extended Oil Fill And Dipstick; Breathers; Oil Dipper Lubrication - Briggs & Stratton 030430 Service And Repair Manual

Extended Oil Fill and Dipstick

These models use a plastic extended oil fi ll tube and a
quarter-turn dipstick. The oil fi ll tube screws into the crank-
case cover.

Breathers

Briggs & Stratton engines utilize a breather valve to control
and maintain crankcase vacuum. The breather valve is a fi ber
disc or reed which closes on the piston up stroke and opens
on the piston down stroke.
The breather is located on the cylinder or inside the rocker
cover, depending on engine model.
Remove Breather
1. Disconnect breather hose (B, Figure 54) from air
cleaner.
2. Remove rocker cover with breather hose (A) and
gasket. Discard gasket.
Figure 54
42

Lubrication Systems

Check Breather
1. Gently blow air into the breather tube. There should be
no air flow out the valve.
2. Apply vacuum to the breather tube. Air should flow
freely into the valve.
3. If air flow is restricted under vacuum at the tube, or
has no resistance when blowing on the tube, replace
the valve cover.
Install Breather
1. Securely insert breather hose into hole in air cleaner
base.
2. Place new gasket and valve cover on cylinder head.
3. Install four screws and torque to values listed in Engine
Specifications.
NOTE: Install three long screws on the sides and bottom
edges of valve cover. Install short screw on top of valve
cover.
Securely insert other end of breather hose into hole in rocker
cover.

Oil Dipper Lubrication

Two types of dippers are used on horizontal shaft engines.
One is integral to the rod cap, the other is a separate part
(A, Figure 55) attached to the rod cap with a connecting rod
screw.
Inspect the dipper for evidence of bending, cracking, or
looseness. Replace if necessary following instructions listed
under Pistons, Rings, and Connecting Rods.
Figure 55
BRIGGSandSTRATTON.COM