Volvo Penta TD520GE Workshop Manual page 16

Technical data
Determination of shim thickness when changing the injection pump.
Mathematical formula for new shim thickness: T
Actual shim thickness, S
NOTE! This formula is applicable when changing the injection pump ONLY.
Calculation 1
Explanation
Cylinder no.
Injection pump manufacturing number
EP code:
Corrected fitting size, see table 3
Basic meas. of inj. pump, see table 1
Manufacturing tolerance, see inj.pump
Theoretical shim thickness
Shim thickness, see table 2
Example: Change of injection pump for cylinder 3 on a TAD 720 engine.
1. Read the EP code for cylinder 3 from the engine identification plate, in the "EP" column, e.g. 397.
(Sequence from top: row 1 = cyl. 1, row 2 = cyl. 2 etc.).
TAD720GE
123.0
DIN/ISO03046ICFN
2. Using the EP code, read the corrected fitting size (E
Ex. EP code = 397 → → → → → E
3. Take the manufacturing tolerance for the
injector pump length, A, from the new injector
pump,
Ex. 63 (see figure)
NOTE! If the value is not visible, remove
possible dirt, without scraping.
The tolerance value A is divided by 100 in
calculations.
4. Take the standard size for the injector pump, L
Ex. 143 mm.
5. Determine the theoretical shim thickness, T
(Also see examples in "Calculation 1")
Ex. T = 146.9 mm – (143 mm + 0.64 mm)
s
T = 4.54
s
6. Select shim thickness, S
= 4.54 mm → → → → → S
Ex. T
s
26
, can be found in Table 2. S
s
Factor
XXX
XXX
EP
E
k
L
0
A/100
T
S
S
S
xxxxxxxxxx
2300 6.0 A
+32
100
= 146.9 mm.
k
s
, from Table 2.
s
= 4.5 mm
s
= Ek - (L + A/100)
s 0
→ → → → → T
s s
Ex TD/TAD 520/720/721/722
Cyl: 1 Cyl: 2
397
146.9
- 143
- 0.63
= 3.27
~ 3.3
A
xxx
A
xxx
A
397
A
xxx
A
xxx
A
xxx
) for the injection pump from Table 3.
k
A/100
, from Table 1.
0
, according to the formula: T
Cyl: 3 Cyl: 4 Cyl: 5 Cyl: 6
= E – (L + A/100)
s k 0
Group 20