Volvo Penta TAD720GE User Manual

Technical Data: TD/TAD720-722, TAD730-733, TAD750/760
65
Group 20
Valve guides
Length:
Inlet/Exhaust ..................................................... 63
-0.5
mm (2.48"
-0.02"
)
Inner diameter Ø:
Inlet/Exhaust ..................................................... 9.025–9.04 mm (0.3553–0.3559")
Height above cylinder head spring surface:
Inlet/Exhaust ..................................................... 23
-0.5
mm (0.9"
-0.02"
)
Wear limit valve stem – guide:
Inlet ................................................................... 0.1 mm (0.039")
Exhaust ............................................................. 0.13 mm (0.51")
Valve springs
Type ..................................................................... Single
Length: Unloaded: n=2300 .................................... 64.7
±1.3
mm (2.55"
±0.05"
)
Wire diameter Ø .................................................... 4.5 mm (0.18")
Diameter Ø (C), standard:
Inlet ................................................................... 49
-0.025
mm (1.929"
-0.001"
)
Exhaust ............................................................. 43.5
-0.02
mm (1.712"
-0.001"
)
Depth (D):
Inlet/Exhaust ..................................................... 11
+1
mm (0.43"
+0.04"
)
Seat bottom radius (R):
Inlet/Exhaust ..................................................... 1
-0.3
mm (0.04"
-0.012"
)
Measurement between valve disc and cylinder head face:
Inlet/Exhaust ..................................................... Min 1.5 mm (0.059")
Ø C
R
D
Valve seat location
Design 1
without flange
Design 2
On later models the o-ring seal is exchange to a valve
stem sealing, according to the picture for design 2.
Design 1
with flange
Flange
Production Exchange
O-ring

Volvo Penta TAD720GE Specifications

General

Brand	Volvo Penta
Model	TAD720GE
Category	Engine
Language	English